diff --git a/Code/Tools/ProjectManager/Source/CreateProjectCtrl.cpp b/Code/Tools/ProjectManager/Source/CreateProjectCtrl.cpp
index 6b19e839d7..205395c935 100644
--- a/Code/Tools/ProjectManager/Source/CreateProjectCtrl.cpp
+++ b/Code/Tools/ProjectManager/Source/CreateProjectCtrl.cpp
@@ -15,6 +15,7 @@
 #include <GemCatalog/GemCatalogScreen.h>
 #include <GemRepo/GemRepoScreen.h>
 #include <ProjectUtils.h>
+#include <DownloadController.h>
 
 #include <QDialogButtonBox>
 #include <QHBoxLayout>
diff --git a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.cpp b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.cpp
index e676ba73d3..d6f4da0051 100644
--- a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.cpp
+++ b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.cpp
@@ -7,25 +7,32 @@
  */
 
 #include <GemCatalog/GemCatalogHeaderWidget.h>
+#include <TagWidget.h>
+
 #include <AzCore/std/functional.h>
+
 #include <QHBoxLayout>
 #include <QMouseEvent>
 #include <QLabel>
 #include <QPushButton>
 #include <QProgressBar>
-#include <TagWidget.h>
 #include <QMenu>
 #include <QLocale>
 #include <QMovie>
+#include <QPainter>
+#include <QPainterPath>
 
 namespace O3DE::ProjectManager
 {
-    CartOverlayWidget::CartOverlayWidget(GemModel* gemModel, DownloadController* downloadController, QWidget* parent)
-        : QWidget(parent)
+    GemCartWidget::GemCartWidget(GemModel* gemModel, DownloadController* downloadController, QWidget* parent)
+        : QScrollArea(parent)
         , m_gemModel(gemModel)
         , m_downloadController(downloadController)
     {
         setObjectName("GemCatalogCart");
+        setWidgetResizable(true);
+        setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+        setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 
         m_layout = new QVBoxLayout();
         m_layout->setSpacing(0);
@@ -118,17 +125,15 @@ namespace O3DE::ProjectManager
                 }
                 return dependencies;
             });
-
-        setWindowFlags(Qt::FramelessWindowHint | Qt::Dialog);
     }
 
-    CartOverlayWidget::~CartOverlayWidget()
+    GemCartWidget::~GemCartWidget()
     {
         // disconnect from all download controller signals
         disconnect(m_downloadController, nullptr, this, nullptr);
     }
 
-    void CartOverlayWidget::CreateGemSection(const QString& singularTitle, const QString& pluralTitle, GetTagIndicesCallback getTagIndices)
+    void GemCartWidget::CreateGemSection(const QString& singularTitle, const QString& pluralTitle, GetTagIndicesCallback getTagIndices)
     {
         QWidget* widget = new QWidget();
         widget->setFixedWidth(s_width);
@@ -164,12 +169,12 @@ namespace O3DE::ProjectManager
         update();
     }
 
-    void CartOverlayWidget::OnCancelDownloadActivated(const QString& gemName)
+    void GemCartWidget::OnCancelDownloadActivated(const QString& gemName)
     {
         m_downloadController->CancelGemDownload(gemName);
     }
 
-    void CartOverlayWidget::CreateDownloadSection()
+    void GemCartWidget::CreateDownloadSection()
     {
         m_downloadSectionWidget = new QWidget();
         m_downloadSectionWidget->setFixedWidth(s_width);
@@ -223,12 +228,12 @@ namespace O3DE::ProjectManager
         }
 
         // connect to download controller data changed
-        connect(m_downloadController, &DownloadController::GemDownloadAdded, this, &CartOverlayWidget::GemDownloadAdded);
-        connect(m_downloadController, &DownloadController::GemDownloadRemoved, this, &CartOverlayWidget::GemDownloadRemoved);
-        connect(m_downloadController, &DownloadController::GemDownloadProgress, this, &CartOverlayWidget::GemDownloadProgress);
+        connect(m_downloadController, &DownloadController::GemDownloadAdded, this, &GemCartWidget::GemDownloadAdded);
+        connect(m_downloadController, &DownloadController::GemDownloadRemoved, this, &GemCartWidget::GemDownloadRemoved);
+        connect(m_downloadController, &DownloadController::GemDownloadProgress, this, &GemCartWidget::GemDownloadProgress);
     }
 
-    void CartOverlayWidget::GemDownloadAdded(const QString& gemName)
+    void GemCartWidget::GemDownloadAdded(const QString& gemName)
     {
         // Containing widget for the current download item
         QWidget* newGemDownloadWidget = new QWidget();
@@ -246,7 +251,7 @@ namespace O3DE::ProjectManager
         nameProgressLayout->addStretch();
         QLabel* cancelText = new QLabel(tr("<a href=\"%1\">Cancel</a>").arg(gemName), newGemDownloadWidget);
         cancelText->setTextInteractionFlags(Qt::LinksAccessibleByMouse);
-        connect(cancelText, &QLabel::linkActivated, this, &CartOverlayWidget::OnCancelDownloadActivated);
+        connect(cancelText, &QLabel::linkActivated, this, &GemCartWidget::OnCancelDownloadActivated);
         nameProgressLayout->addWidget(cancelText);
         downloadingGemLayout->addLayout(nameProgressLayout);
 
@@ -267,7 +272,7 @@ namespace O3DE::ProjectManager
         m_downloadingListWidget->show();
     }
 
-    void CartOverlayWidget::GemDownloadRemoved(const QString& gemName)
+    void GemCartWidget::GemDownloadRemoved(const QString& gemName)
     {
         QWidget* gemToRemove = m_downloadingListWidget->findChild<QWidget*>(gemName);
         if (gemToRemove)
@@ -289,7 +294,7 @@ namespace O3DE::ProjectManager
         }
     }
 
-    void CartOverlayWidget::GemDownloadProgress(const QString& gemName, int bytesDownloaded, int totalBytes)
+    void GemCartWidget::GemDownloadProgress(const QString& gemName, int bytesDownloaded, int totalBytes)
     {
         QWidget* gemToUpdate = m_downloadingListWidget->findChild<QWidget*>(gemName);
         if (gemToUpdate)
@@ -324,7 +329,7 @@ namespace O3DE::ProjectManager
         }
     }
 
-    QVector<Tag> CartOverlayWidget::GetTagsFromModelIndices(const QVector<QModelIndex>& gems) const
+    QVector<Tag> GemCartWidget::GetTagsFromModelIndices(const QVector<QModelIndex>& gems) const
     {
         QVector<Tag> tags;
         tags.reserve(gems.size());
@@ -349,7 +354,7 @@ namespace O3DE::ProjectManager
         iconButton->setFocusPolicy(Qt::NoFocus);
         iconButton->setIcon(QIcon(":/Summary.svg"));
         iconButton->setFixedSize(s_iconSize, s_iconSize);
-        connect(iconButton, &QPushButton::clicked, this, &CartButton::ShowOverlay);
+        connect(iconButton, &QPushButton::clicked, this, &CartButton::ShowGemCart);
         m_layout->addWidget(iconButton);
 
         m_countLabel = new QLabel();
@@ -362,7 +367,7 @@ namespace O3DE::ProjectManager
         m_dropDownButton->setFocusPolicy(Qt::NoFocus);
         m_dropDownButton->setIcon(QIcon(":/CarrotArrowDown.svg"));
         m_dropDownButton->setFixedSize(s_arrowDownIconSize, s_arrowDownIconSize);
-        connect(m_dropDownButton, &QPushButton::clicked, this, &CartButton::ShowOverlay);
+        connect(m_dropDownButton, &QPushButton::clicked, this, &CartButton::ShowGemCart);
         m_layout->addWidget(m_dropDownButton);
 
         // Adjust the label text whenever the model gets updated.
@@ -377,28 +382,28 @@ namespace O3DE::ProjectManager
                 m_dropDownButton->setVisible(!toBeAdded.isEmpty() || !toBeRemoved.isEmpty());
 
                 // Automatically close the overlay window in case there are no gems to be activated or deactivated anymore.
-                if (m_cartOverlay && toBeAdded.isEmpty() && toBeRemoved.isEmpty())
+                if (m_gemCart && toBeAdded.isEmpty() && toBeRemoved.isEmpty())
                 {
-                    m_cartOverlay->deleteLater();
-                    m_cartOverlay = nullptr;
+                    m_gemCart->deleteLater();
+                    m_gemCart = nullptr;
                 }
             });
     }
 
     void CartButton::mousePressEvent([[maybe_unused]] QMouseEvent* event)
     {
-        ShowOverlay();
+        ShowGemCart();
     }
 
     void CartButton::hideEvent(QHideEvent*)
     {
-        if (m_cartOverlay)
+        if (m_gemCart)
         {
-            m_cartOverlay->hide();
+            m_gemCart->hide();
         }
     }
 
-    void CartButton::ShowOverlay()
+    void CartButton::ShowGemCart()
     {
         const QVector<QModelIndex> toBeAdded = m_gemModel->GatherGemsToBeAdded(/*includeDependencies=*/true);
         const QVector<QModelIndex> toBeRemoved = m_gemModel->GatherGemsToBeRemoved(/*includeDependencies=*/true);
@@ -407,37 +412,33 @@ namespace O3DE::ProjectManager
             return;
         }
 
-        if (m_cartOverlay)
+        if (m_gemCart)
         {
             // Directly delete the former overlay before creating the new one.
             // Don't use deleteLater() here. This might overwrite the new overlay pointer
             // depending on the event queue.
-            delete m_cartOverlay;
+            delete m_gemCart;
         }
 
-        m_cartOverlay = new CartOverlayWidget(m_gemModel, m_downloadController, this);
-        connect(m_cartOverlay, &QWidget::destroyed, this, [=]
+        m_gemCart = new GemCartWidget(m_gemModel, m_downloadController, this);
+        connect(m_gemCart, &QWidget::destroyed, this, [=]
             {
                 // Reset the overlay pointer on destruction to prevent dangling pointers.
-                m_cartOverlay = nullptr;
+                m_gemCart = nullptr;
+                // Tell header gem cart is no longer open
+                UpdateGemCart(nullptr);
             });
-        m_cartOverlay->show();
+        m_gemCart->show();
 
-        const QPoint parentPos = m_dropDownButton->mapToParent(m_dropDownButton->pos());
-        const QPoint globalPos = m_dropDownButton->mapToGlobal(m_dropDownButton->pos());
-        const QPoint offset(-4, 10);
-        m_cartOverlay->setGeometry(globalPos.x() - parentPos.x() - m_cartOverlay->width() + width() + offset.x(),
-            globalPos.y() + offset.y(),
-            m_cartOverlay->width(),
-            m_cartOverlay->height());
+        emit UpdateGemCart(m_gemCart);
     }
 
     CartButton::~CartButton()
     {
         // Make sure the overlay window is automatically closed in case the gem catalog is destroyed.
-        if (m_cartOverlay)
+        if (m_gemCart)
         {
-            m_cartOverlay->deleteLater();
+            m_gemCart->deleteLater();
         }
     }
 
@@ -514,6 +515,17 @@ namespace O3DE::ProjectManager
 
         connect(m_downloadController, &DownloadController::GemDownloadAdded, this, &GemCatalogHeaderWidget::GemDownloadAdded);
         connect(m_downloadController, &DownloadController::GemDownloadRemoved, this, &GemCatalogHeaderWidget::GemDownloadRemoved);
+
+        connect(
+            m_cartButton, &CartButton::UpdateGemCart, this,
+            [this](QWidget* gemCart)
+            {
+                GemCartShown(gemCart);
+                if (gemCart)
+                {
+                    emit UpdateGemCart(gemCart);
+                }
+            });
     }
 
     void GemCatalogHeaderWidget::GemDownloadAdded(const QString& /*gemName*/)
@@ -521,7 +533,7 @@ namespace O3DE::ProjectManager
         m_downloadSpinner->show();
         m_downloadLabel->show();
         m_downloadSpinnerMovie->start();
-        m_cartButton->ShowOverlay();
+        m_cartButton->ShowGemCart();
     }
 
     void GemCatalogHeaderWidget::GemDownloadRemoved(const QString& /*gemName*/)
@@ -534,8 +546,44 @@ namespace O3DE::ProjectManager
         }
     }
 
+    void GemCatalogHeaderWidget::GemCartShown(bool state)
+    {
+        m_showGemCart = state;
+        repaint();
+    }
+
     void GemCatalogHeaderWidget::ReinitForProject()
     {
         m_filterLineEdit->setText({});
     }
+
+    void GemCatalogHeaderWidget::paintEvent([[maybe_unused]] QPaintEvent* event)
+    {
+        // Only show triangle when cart is shown
+        if (!m_showGemCart)
+        {
+            return;
+        }
+
+        const QPoint buttonPos = m_cartButton->pos();
+        const QSize buttonSize = m_cartButton->size();
+
+        // Draw isosceles triangle with top point touching bottom of cartButton
+        // Bottom aligned with header bottom and top of right panel
+        const QPoint topPoint(buttonPos.x() + buttonSize.width() / 2, buttonPos.y() + buttonSize.height());
+        const QPoint bottomLeftPoint(topPoint.x() - 20, height());
+        const QPoint bottomRightPoint(topPoint.x() + 20, height());
+
+        QPainterPath trianglePath;
+        trianglePath.moveTo(topPoint);
+        trianglePath.lineTo(bottomLeftPoint);
+        trianglePath.lineTo(bottomRightPoint);
+        trianglePath.lineTo(topPoint);
+
+        QPainter painter(this);
+        painter.setRenderHint(QPainter::Antialiasing, true);
+        painter.setPen(Qt::NoPen);
+        painter.fillPath(trianglePath, QBrush(QColor("#555555")));
+    }
+
 } // namespace O3DE::ProjectManager
diff --git a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.h b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.h
index 5174fde57d..b749e9831d 100644
--- a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.h
+++ b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogHeaderWidget.h
@@ -14,8 +14,10 @@
 #include <GemCatalog/GemModel.h>
 #include <GemCatalog/GemSortFilterProxyModel.h>
 #include <TagWidget.h>
-#include <QFrame>
 #include <DownloadController.h>
+
+#include <QFrame>
+#include <QScrollArea>
 #endif
 
 QT_FORWARD_DECLARE_CLASS(QPushButton)
@@ -28,14 +30,14 @@ QT_FORWARD_DECLARE_CLASS(QMovie)
 
 namespace O3DE::ProjectManager
 {
-    class CartOverlayWidget
-        : public QWidget
+    class GemCartWidget
+        : public QScrollArea
     {
         Q_OBJECT // AUTOMOC
 
     public:
-        CartOverlayWidget(GemModel* gemModel, DownloadController* downloadController, QWidget* parent = nullptr);
-        ~CartOverlayWidget();
+        GemCartWidget(GemModel* gemModel, DownloadController* downloadController, QWidget* parent = nullptr);
+        ~GemCartWidget();
 
     public slots:
         void GemDownloadAdded(const QString& gemName);
@@ -68,7 +70,10 @@ namespace O3DE::ProjectManager
     public:
         CartButton(GemModel* gemModel, DownloadController* downloadController, QWidget* parent = nullptr);
         ~CartButton();
-        void ShowOverlay();
+        void ShowGemCart();
+
+    signals:
+        void UpdateGemCart(QWidget* gemCart);
 
     private:
         void mousePressEvent(QMouseEvent* event) override;
@@ -78,7 +83,7 @@ namespace O3DE::ProjectManager
         QHBoxLayout* m_layout = nullptr;
         QLabel* m_countLabel = nullptr;
         QPushButton* m_dropDownButton = nullptr;
-        CartOverlayWidget* m_cartOverlay = nullptr;
+        GemCartWidget* m_gemCart = nullptr;
         DownloadController* m_downloadController = nullptr;
 
         inline constexpr static int s_iconSize = 24;
@@ -99,11 +104,16 @@ namespace O3DE::ProjectManager
     public slots:
         void GemDownloadAdded(const QString& gemName);
         void GemDownloadRemoved(const QString& gemName);
+        void GemCartShown(bool state = false);
 
     signals:
         void AddGem();
         void OpenGemsRepo();
         void RefreshGems();
+        void UpdateGemCart(QWidget* gemCart);
+
+    protected slots:
+        void paintEvent(QPaintEvent* event) override;
         
     private:
         AzQtComponents::SearchLineEdit* m_filterLineEdit = nullptr;
@@ -113,5 +123,6 @@ namespace O3DE::ProjectManager
         QLabel* m_downloadLabel = nullptr;
         QMovie* m_downloadSpinnerMovie = nullptr;
         CartButton* m_cartButton = nullptr;
+        bool m_showGemCart = false;
     };
 } // namespace O3DE::ProjectManager
diff --git a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.cpp b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.cpp
index bc0e6c240d..c11a9b9de1 100644
--- a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.cpp
+++ b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.cpp
@@ -8,6 +8,11 @@
 
 #include <GemCatalog/GemCatalogScreen.h>
 #include <PythonBindingsInterface.h>
+#include <GemCatalog/GemCatalogHeaderWidget.h>
+#include <GemCatalog/GemFilterWidget.h>
+#include <GemCatalog/GemListView.h>
+#include <GemCatalog/GemInspector.h>
+#include <GemCatalog/GemModel.h>
 #include <GemCatalog/GemListHeaderWidget.h>
 #include <GemCatalog/GemSortFilterProxyModel.h>
 #include <GemCatalog/GemRequirementDialog.h>
@@ -28,6 +33,7 @@
 #include <QFileDialog>
 #include <QMessageBox>
 #include <QHash>
+#include <QStackedWidget>
 
 namespace O3DE::ProjectManager
 {
@@ -51,9 +57,11 @@ namespace O3DE::ProjectManager
         vLayout->addWidget(m_headerWidget);
 
         connect(m_gemModel, &GemModel::gemStatusChanged, this, &GemCatalogScreen::OnGemStatusChanged);
+        connect(m_gemModel->GetSelectionModel(), &QItemSelectionModel::selectionChanged, this, [this]{ ShowInspector(); });
         connect(m_headerWidget, &GemCatalogHeaderWidget::RefreshGems, this, &GemCatalogScreen::Refresh);
         connect(m_headerWidget, &GemCatalogHeaderWidget::OpenGemsRepo, this, &GemCatalogScreen::HandleOpenGemRepo);
         connect(m_headerWidget, &GemCatalogHeaderWidget::AddGem, this, &GemCatalogScreen::OnAddGemClicked);
+        connect(m_headerWidget, &GemCatalogHeaderWidget::UpdateGemCart, this, &GemCatalogScreen::UpdateAndShowGemCart);
         connect(m_downloadController, &DownloadController::Done, this, &GemCatalogScreen::OnGemDownloadResult);
 
         QHBoxLayout* hLayout = new QHBoxLayout();
@@ -61,8 +69,11 @@ namespace O3DE::ProjectManager
         vLayout->addLayout(hLayout);
 
         m_gemListView = new GemListView(m_proxyModel, m_proxyModel->GetSelectionModel(), this);
+
+        m_rightPanelStack = new QStackedWidget(this);
+        m_rightPanelStack->setFixedWidth(240);
+
         m_gemInspector = new GemInspector(m_gemModel, this);
-        m_gemInspector->setFixedWidth(240);
 
         connect(m_gemInspector, &GemInspector::TagClicked, [=](const Tag& tag) { SelectGem(tag.id); });
         connect(m_gemInspector, &GemInspector::UpdateGem, this, &GemCatalogScreen::UpdateGem);
@@ -85,7 +96,9 @@ namespace O3DE::ProjectManager
 
         hLayout->addWidget(filterWidget);
         hLayout->addLayout(middleVLayout);
-        hLayout->addWidget(m_gemInspector);
+
+        hLayout->addWidget(m_rightPanelStack);
+        m_rightPanelStack->addWidget(m_gemInspector);
 
         m_notificationsView = AZStd::make_unique<AzToolsFramework::ToastNotificationsView>(this, AZ_CRC("GemCatalogNotificationsView"));
         m_notificationsView->SetOffset(QPoint(10, 70));
@@ -303,6 +316,8 @@ namespace O3DE::ProjectManager
         QModelIndex proxyIndex = m_proxyModel->mapFromSource(modelIndex);
         m_proxyModel->GetSelectionModel()->setCurrentIndex(proxyIndex, QItemSelectionModel::ClearAndSelect);
         m_gemListView->scrollTo(proxyIndex);
+
+        ShowInspector();
     }
 
     void GemCatalogScreen::UpdateGem(const QModelIndex& modelIndex)
@@ -496,6 +511,12 @@ namespace O3DE::ProjectManager
         }
     }
 
+    void GemCatalogScreen::ShowInspector()
+    {
+        m_rightPanelStack->setCurrentIndex(RightPanelWidgetOrder::Inspector);
+        m_headerWidget->GemCartShown();
+    }
+
     GemCatalogScreen::EnableDisableGemsResult GemCatalogScreen::EnableDisableGemsForProject(const QString& projectPath)
     {
         IPythonBindings* pythonBindings = PythonBindingsInterface::Get();
@@ -577,6 +598,18 @@ namespace O3DE::ProjectManager
         emit ChangeScreenRequest(ProjectManagerScreen::GemRepos);
     }
 
+    void GemCatalogScreen::UpdateAndShowGemCart(QWidget* cartWidget)
+    {
+        QWidget* previousCart = m_rightPanelStack->widget(RightPanelWidgetOrder::Cart);
+        if (previousCart)
+        {
+            m_rightPanelStack->removeWidget(previousCart);
+        }
+
+        m_rightPanelStack->insertWidget(RightPanelWidgetOrder::Cart, cartWidget);
+        m_rightPanelStack->setCurrentIndex(RightPanelWidgetOrder::Cart);
+    }
+
     void GemCatalogScreen::OnGemDownloadResult(const QString& gemName, bool succeeded)
     {
         if (succeeded)
diff --git a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.h b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.h
index c5fbb057ef..2deaa41b9e 100644
--- a/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.h
+++ b/Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.h
@@ -12,18 +12,24 @@
 #include <ScreenWidget.h>
 #include <AzCore/std/smart_ptr/unique_ptr.h>
 #include <AzToolsFramework/UI/Notifications/ToastNotificationsView.h>
-#include <GemCatalog/GemCatalogHeaderWidget.h>
-#include <GemCatalog/GemFilterWidget.h>
-#include <GemCatalog/GemListView.h>
-#include <GemCatalog/GemInspector.h>
-#include <GemCatalog/GemModel.h>
-#include <GemCatalog/GemSortFilterProxyModel.h>
+
 #include <QSet>
 #include <QString>
 #endif
 
+QT_FORWARD_DECLARE_CLASS(QVBoxLayout)
+QT_FORWARD_DECLARE_CLASS(QStackedWidget)
+
 namespace O3DE::ProjectManager
 {
+    QT_FORWARD_DECLARE_CLASS(GemCatalogHeaderWidget)
+    QT_FORWARD_DECLARE_CLASS(GemFilterWidget)
+    QT_FORWARD_DECLARE_CLASS(GemListView)
+    QT_FORWARD_DECLARE_CLASS(GemInspector)
+    QT_FORWARD_DECLARE_CLASS(GemModel)
+    QT_FORWARD_DECLARE_CLASS(GemSortFilterProxyModel)
+    QT_FORWARD_DECLARE_CLASS(DownloadController)
+
     class GemCatalogScreen
         : public ScreenWidget
     {
@@ -62,14 +68,22 @@ namespace O3DE::ProjectManager
 
     private slots:
         void HandleOpenGemRepo();
-
+        void UpdateAndShowGemCart(QWidget* cartWidget);
+        void ShowInspector();
 
     private:
+        enum RightPanelWidgetOrder
+        {
+            Inspector = 0,
+            Cart
+        };
+
         void FillModel(const QString& projectPath);
 
         AZStd::unique_ptr<AzToolsFramework::ToastNotificationsView> m_notificationsView;
 
         GemListView* m_gemListView = nullptr;
+        QStackedWidget* m_rightPanelStack = nullptr;
         GemInspector* m_gemInspector = nullptr;
         GemModel* m_gemModel = nullptr;
         GemCatalogHeaderWidget* m_headerWidget = nullptr;
diff --git a/Code/Tools/ProjectManager/Source/UpdateProjectCtrl.cpp b/Code/Tools/ProjectManager/Source/UpdateProjectCtrl.cpp
index 5f0d0c3f72..36d78ed2ac 100644
--- a/Code/Tools/ProjectManager/Source/UpdateProjectCtrl.cpp
+++ b/Code/Tools/ProjectManager/Source/UpdateProjectCtrl.cpp
@@ -15,8 +15,8 @@
 #include <UpdateProjectCtrl.h>
 #include <UpdateProjectSettingsScreen.h>
 #include <ProjectUtils.h>
+#include <DownloadController.h>
 #include <ProjectManagerSettings.h>
-
 #include <AzCore/Settings/SettingsRegistry.h>
 
 #include <QDialogButtonBox>