diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 69a63625524d1..fc97423e64888 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -473,15 +473,19 @@ function create_initial_post_types() {
 	register_post_type(
 		'wp_global_styles',
 		array(
-			'label'        => _x( 'Global Styles', 'post type general name' ),
-			'description'  => __( 'Global styles to include in themes.' ),
-			'public'       => false,
-			'_builtin'     => true, /* internal use only. don't use this when registering your own post type. */
-			'_edit_link'   => '/site-editor.php?canvas=edit', /* internal use only. don't use this when registering your own post type. */
-			'show_ui'      => false,
-			'show_in_rest' => false,
-			'rewrite'      => false,
-			'capabilities' => array(
+			'label'                           => _x( 'Global Styles', 'post type general name' ),
+			'description'                     => __( 'Global styles to include in themes.' ),
+			'public'                          => false,
+			'_builtin'                        => true, /* internal use only. don't use this when registering your own post type. */
+			'_edit_link'                      => '/site-editor.php?canvas=edit', /* internal use only. don't use this when registering your own post type. */
+			'show_ui'                         => false,
+			'show_in_rest'                    => true,
+			'rewrite'                         => false,
+			'rest_base'                       => 'global-styles',
+			'rest_controller_class'           => 'WP_REST_Global_Styles_Controller',
+			'revisions_rest_controller_class' => 'WP_REST_Global_Styles_Revisions_Controller',
+			'late_route_registration'         => true,
+			'capabilities'                    => array(
 				'read'                   => 'edit_theme_options',
 				'create_posts'           => 'edit_theme_options',
 				'edit_posts'             => 'edit_theme_options',
@@ -490,8 +494,8 @@ function create_initial_post_types() {
 				'edit_others_posts'      => 'edit_theme_options',
 				'delete_others_posts'    => 'edit_theme_options',
 			),
-			'map_meta_cap' => true,
-			'supports'     => array(
+			'map_meta_cap'                    => true,
+			'supports'                        => array(
 				'title',
 				'editor',
 				'revisions',
diff --git a/src/wp-includes/rest-api.php b/src/wp-includes/rest-api.php
index 2631a6663fe92..2dead4ad8f2f0 100644
--- a/src/wp-includes/rest-api.php
+++ b/src/wp-includes/rest-api.php
@@ -323,14 +323,6 @@ function create_initial_rest_routes() {
 	$controller = new WP_REST_Block_Types_Controller();
 	$controller->register_routes();
 
-	// Global Styles revisions.
-	$controller = new WP_REST_Global_Styles_Revisions_Controller();
-	$controller->register_routes();
-
-	// Global Styles.
-	$controller = new WP_REST_Global_Styles_Controller();
-	$controller->register_routes();
-
 	// Settings.
 	$controller = new WP_REST_Settings_Controller();
 	$controller->register_routes();
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php
index 9837f535e268d..670dd401efd14 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php
@@ -10,26 +10,7 @@
 /**
  * Base Global Styles REST API Controller.
  */
-class WP_REST_Global_Styles_Controller extends WP_REST_Controller {
-
-	/**
-	 * Post type.
-	 *
-	 * @since 5.9.0
-	 * @var string
-	 */
-	protected $post_type;
-
-	/**
-	 * Constructor.
-	 * @since 5.9.0
-	 */
-	public function __construct() {
-		$this->namespace = 'wp/v2';
-		$this->rest_base = 'global-styles';
-		$this->post_type = 'wp_global_styles';
-	}
-
+class WP_REST_Global_Styles_Controller extends WP_REST_Posts_Controller {
 	/**
 	 * Registers the controllers routes.
 	 *
@@ -125,34 +106,6 @@ public function _sanitize_global_styles_callback( $id_or_stylesheet ) {
 		return urldecode( $id_or_stylesheet );
 	}
 
-	/**
-	 * Get the post, if the ID is valid.
-	 *
-	 * @since 5.9.0
-	 *
-	 * @param int $id Supplied ID.
-	 * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.
-	 */
-	protected function get_post( $id ) {
-		$error = new WP_Error(
-			'rest_global_styles_not_found',
-			__( 'No global styles config exist with that id.' ),
-			array( 'status' => 404 )
-		);
-
-		$id = (int) $id;
-		if ( $id <= 0 ) {
-			return $error;
-		}
-
-		$post = get_post( $id );
-		if ( empty( $post ) || empty( $post->ID ) || $this->post_type !== $post->post_type ) {
-			return $error;
-		}
-
-		return $post;
-	}
-
 	/**
 	 * Checks if a given request has access to read a single global style.
 	 *
@@ -194,7 +147,7 @@ public function get_item_permissions_check( $request ) {
 	 * @param WP_Post $post Post object.
 	 * @return bool Whether the post can be read.
 	 */
-	protected function check_read_permission( $post ) {
+	public function check_read_permission( $post ) {
 		return current_user_can( 'read_post', $post->ID );
 	}
 
@@ -241,18 +194,6 @@ public function update_item_permissions_check( $request ) {
 		return true;
 	}
 
-	/**
-	 * Checks if a global style can be edited.
-	 *
-	 * @since 5.9.0
-	 *
-	 * @param WP_Post $post Post object.
-	 * @return bool Whether the post can be edited.
-	 */
-	protected function check_update_permission( $post ) {
-		return current_user_can( 'edit_post', $post->ID );
-	}
-
 	/**
 	 * Updates a single global style config.
 	 *
@@ -407,7 +348,7 @@ public function prepare_item_for_response( $post, $request ) {
 			$links = $this->prepare_links( $post->ID );
 			$response->add_links( $links );
 			if ( ! empty( $links['self']['href'] ) ) {
-				$actions = $this->get_available_actions();
+				$actions = $this->get_available_actions( $post, $request );
 				$self    = $links['self']['href'];
 				foreach ( $actions as $rel ) {
 					$response->add_link( $rel, $self );
@@ -431,9 +372,12 @@ protected function prepare_links( $id ) {
 		$base = sprintf( '%s/%s', $this->namespace, $this->rest_base );
 
 		$links = array(
-			'self' => array(
+			'self'  => array(
 				'href' => rest_url( trailingslashit( $base ) . $id ),
 			),
+			'about' => array(
+				'href' => rest_url( 'wp/v2/types/' . $this->post_type ),
+			),
 		);
 
 		if ( post_type_supports( $this->post_type, 'revisions' ) ) {
@@ -457,10 +401,10 @@ protected function prepare_links( $id ) {
 	 *
 	 * @return array List of link relations.
 	 */
-	protected function get_available_actions() {
+	protected function get_available_actions( $post, $request ) {
 		$rels = array();
 
-		$post_type = get_post_type_object( $this->post_type );
+		$post_type = get_post_type_object( $post->post_type );
 		if ( current_user_can( $post_type->cap->publish_posts ) ) {
 			$rels[] = 'https://api.w.org/action-publish';
 		}
@@ -472,21 +416,6 @@ protected function get_available_actions() {
 		return $rels;
 	}
 
-	/**
-	 * Overwrites the default protected title format.
-	 *
-	 * By default, WordPress will show password protected posts with a title of
-	 * "Protected: %s", as the REST API communicates the protected status of a post
-	 * in a machine readable format, we remove the "Protected: " prefix.
-	 *
-	 * @since 5.9.0
-	 *
-	 * @return string Protected title format.
-	 */
-	public function protected_title_format() {
-		return '%s';
-	}
-
 	/**
 	 * Retrieves the query params for the global styles collection.
 	 *
diff --git a/tests/phpunit/tests/rest-api/rest-global-styles-controller.php b/tests/phpunit/tests/rest-api/rest-global-styles-controller.php
index 07050a0515e17..8f3734347f165 100644
--- a/tests/phpunit/tests/rest-api/rest-global-styles-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-global-styles-controller.php
@@ -225,7 +225,7 @@ public function data_get_theme_item_invalid_theme_dirname() {
 			// Themes deep in subdirectories.
 			'2 subdirectories deep'  => array(
 				'theme_dirname' => 'subdir/subsubdir/mytheme',
-				'expected'      => 'rest_global_styles_not_found',
+				'expected'      => 'rest_post_invalid_id',
 			),
 		);
 	}
@@ -322,7 +322,7 @@ public function test_get_item_invalid_post() {
 		wp_set_current_user( self::$admin_id );
 		$request  = new WP_REST_Request( 'GET', '/wp/v2/global-styles/' . self::$post_id );
 		$response = rest_get_server()->dispatch( $request );
-		$this->assertErrorResponse( 'rest_global_styles_not_found', $response, 404 );
+		$this->assertErrorResponse( 'rest_post_invalid_id', $response, 404 );
 	}
 
 	/**
@@ -431,7 +431,7 @@ public function test_update_item_invalid_post() {
 		wp_set_current_user( self::$admin_id );
 		$request  = new WP_REST_Request( 'PUT', '/wp/v2/global-styles/' . self::$post_id );
 		$response = rest_get_server()->dispatch( $request );
-		$this->assertErrorResponse( 'rest_global_styles_not_found', $response, 404 );
+		$this->assertErrorResponse( 'rest_post_invalid_id', $response, 404 );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/rest-api/rest-schema-setup.php b/tests/phpunit/tests/rest-api/rest-schema-setup.php
index 3ff35260f0fb8..e2d34c559ffe2 100644
--- a/tests/phpunit/tests/rest-api/rest-schema-setup.php
+++ b/tests/phpunit/tests/rest-api/rest-schema-setup.php
@@ -134,6 +134,8 @@ public function test_expected_routes_in_schema() {
 			'/wp/v2/comments',
 			'/wp/v2/comments/(?P<id>[\\d]+)',
 			'/wp/v2/global-styles/(?P<id>[\/\w-]+)',
+			'/wp/v2/global-styles/(?P<id>[\d]+)/autosaves',
+			'/wp/v2/global-styles/(?P<parent>[\d]+)/autosaves/(?P<id>[\d]+)',
 			'/wp/v2/global-styles/(?P<parent>[\d]+)/revisions',
 			'/wp/v2/global-styles/(?P<parent>[\d]+)/revisions/(?P<id>[\d]+)',
 			'/wp/v2/global-styles/themes/(?P<stylesheet>[\/\s%\w\.\(\)\[\]\@_\-]+)/variations',