@@ -357,7 +357,7 @@ Display multiple images in a rich gallery.
 -	**Name:** [core/gallery](https://developer.wordpress.org/block-editor/reference-guides/core-blocks/core-blocks-media/core-block-gallery/)
 -	**Category:** [media](https://developer.wordpress.org/block-editor/reference-guides/core-blocks/core-blocks-media/)
 -	**Allowed Blocks:** core/image
--	**Supports:** align, anchor, background (backgroundImage, backgroundSize, gradient), color (background, gradients, ~~text~~), interactivity (clientNavigation), layout (allowEditing, allowSizingOnChildren, default, ~~allowInheriting~~, ~~allowJustification~~, ~~allowOrientation~~, ~~allowSwitching~~, ~~allowVerticalAlignment~~, ~~allowWrap~~), listView, spacing (blockGap, margin, padding), units (em, px, rem, vh, vw), ~~html~~
+-	**Supports:** align, anchor, background (backgroundImage, backgroundSize, gradient), color (background, gradients, ~~text~~), filter (duotone), interactivity (clientNavigation), layout (allowEditing, allowSizingOnChildren, default, ~~allowInheriting~~, ~~allowJustification~~, ~~allowOrientation~~, ~~allowSwitching~~, ~~allowVerticalAlignment~~, ~~allowWrap~~), listView, spacing (blockGap, margin, padding), units (em, px, rem, vh, vw), ~~html~~
 -	**Attributes:** allowResize, aspectRatio, caption, columns, dynamicContent, fixedHeight, ids, imageCrop, images, linkTarget, linkTo, navigationButtonType, randomOrder, shortCodeTransforms, sizeSlug
 
 ## Group
 
@@ -66,6 +66,8 @@ _Defined via the [`supports`](https://developer.wordpress.org/block-editor/refer
   - [`allowWrap`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/#layout-allowwrap): `false`
   - [`allowSizingOnChildren`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/#layout-allowsizingonchildren): `true`
   - [`default`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/#layout-default): `{"type":"flex"}`
+- [`filter`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/#filter):
+  - [`duotone`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/#filter-duotone): `true`
 - [`interactivity`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/#interactivity):
   - `clientNavigation`: `true`
 - [`listView`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/#listview): `true`
@@ -87,6 +89,13 @@ _Defined via the [`usesContext` and `providesContext`](https://developer.wordpre
 - `fixedHeight` → attribute `fixedHeight`
 - `navigationButtonType` → attribute `navigationButtonType`
 
+## CSS Selectors
+
+_Defined via the [`selectors`](https://developer.wordpress.org/block-editor/reference-guides/block-api/block-selectors/) property in block.json._
+
+- **filter**:
+  - duotone: `.wp-block-gallery :where(img)`
+
 ## Block Markup
 
 This is a [**hybrid block**](https://developer.wordpress.org/block-editor/getting-started/fundamentals/static-dynamic-rendering/). It saves static markup that the server may enhance during rendering.
 
@@ -179,11 +179,19 @@
 				"type": "flex"
 			}
 		},
+		"filter": {
+			"duotone": true
+		},
 		"interactivity": {
 			"clientNavigation": true
 		},
 		"listView": true
 	},
+	"selectors": {
+		"filter": {
+			"duotone": ".wp-block-gallery :where(img)"
+		}
+	},
 	"editorStyle": "wp-block-gallery-editor",
 	"style": "wp-block-gallery"
 }