Add/layout grid block availability

Podfile

@@ -166,7 +166,7 @@ abstract_target 'Apps' do
     ## Gutenberg (React Native)
     ## =====================
     ##
-    gutenberg :tag => 'v1.56.0-alpha1'
+    gutenberg :tag => 'v1.56.0-alpha3'
 
     ## Third party libraries
     ## =====================

WordPress/Classes/Models/Blog.h

@@ -82,6 +82,8 @@ typedef NS_ENUM(NSUInteger, BlogFeature) {
     BlogFeatureStories,
     /// Does the blog support Jetpack contact info block?
     BlogFeatureContactInfo,
+    /// Does the blog support the Layout grid block?
+    BlogFeatureLayoutGrid,
 };
 
 typedef NS_ENUM(NSInteger, SiteVisibility) {

WordPress/Classes/Models/Blog.m

@@ -567,6 +567,8 @@ - (BOOL)supports:(BlogFeature)feature
             return [self supportsStories];
         case BlogFeatureContactInfo:
             return [self supportsContactInfo];
+        case BlogFeatureLayoutGrid:
+            return [self supportsLayoutGrid];
     }
 }
 
@@ -657,6 +659,14 @@ - (BOOL)supportsContactInfo
     return [self hasRequiredJetpackVersion:@"8.5"] || self.isHostedAtWPcom;
 }
 
+- (BOOL)supportsLayoutGrid
+{
+    if (![Feature enabled:FeatureFlagLayoutGrid]) {
+        return false;
+    }
+    return self.isHostedAtWPcom || self.isAtomic;
+}
+
 - (BOOL)accountIsDefaultAccount
 {
     AccountService *accountService = [[AccountService alloc] initWithManagedObjectContext:self.managedObjectContext];

WordPress/Classes/Utility/BuildInformation/FeatureFlag.swift

@@ -12,6 +12,7 @@ enum FeatureFlag: Int, CaseIterable, OverrideableFlag {
     case unifiedPrologueCarousel
     case stories
     case contactInfo
+    case layoutGrid
     case siteCreationHomePagePicker
     case todayWidget
     case milestoneNotifications
@@ -47,6 +48,8 @@ enum FeatureFlag: Int, CaseIterable, OverrideableFlag {
             return true
         case .contactInfo:
             return true
+        case .layoutGrid:
+            return BuildConfiguration.current ~= [.localDeveloper, .a8cBranchTest]
         case .siteCreationHomePagePicker:
             return true
         case .todayWidget:
@@ -107,6 +110,8 @@ extension FeatureFlag {
             return "Stories"
         case .contactInfo:
             return "Contact Info"
+        case .layoutGrid:
+            return "Layout Grid"
         case .siteCreationHomePagePicker:
             return "Site Creation: Home Page Picker"
         case .todayWidget:

WordPress/Classes/ViewRelated/Gutenberg/GutenbergViewController.swift

@@ -1045,6 +1045,7 @@ extension GutenbergViewController: GutenbergBridgeDataSource {
             .mentions: FeatureFlag.gutenbergMentions.enabled && SuggestionService.shared.shouldShowSuggestions(for: post.blog),
             .xposts: FeatureFlag.gutenbergXposts.enabled && SiteSuggestionService.shared.shouldShowSuggestions(for: post.blog),
             .contactInfoBlock: post.blog.supports(.contactInfo) && FeatureFlag.contactInfo.enabled,
+            .layoutGridBlock: post.blog.supports(.layoutGrid),
             .unsupportedBlockEditor: isUnsupportedBlockEditorEnabled,
             .canEnableUnsupportedBlockEditor: post.blog.jetpack?.isConnected ?? false,
             .isAudioBlockMediaUploadEnabled: !isFreeWPCom,