Adding Own Template Library

You can also add your own beautiful Template Library both blocks and templates. When you design your beautiful templates, export it, you will get json file, which can be added on your own theme as template library.
Here is example code

/**
 * Add Own Templates
 *
 * @param array $templates_list
 * List of the Templates
 * 
 * @return array
 */
function prefix_add_own_templates( $templates_list ) {

   $my_templates_list = array(
      array(
         'title' => __( 'Title of Block', 'gutentor' ),/*Title*/
         'type' => 'block',/*either template or block*/
         'author' => __( 'Gutentor', 'gutentor' ),/*Author Name*/
         'keywords' => array( 'about-block', 'about 3' ),/*Search keyword*/
         'categories' => array( 'about' ),/*Categories*/
         'template_url' => 'https://www.doamin.com/gutentor-block-or-template.json',/*Json file url */
         'screenshot_url' => 'https://www.doamin.com/gutentor-block-or-template.jpg',/*Screenshot of block*/
         'demo_url' => 'https://www.demo-doamin.com/',/*Demo Url*/
      ),
      array(
         'title' => __( 'Title of Block', 'gutentor' ),/*Title*/
         'type' => 'template',/*either template or block*/
         'author' => __( 'Gutentor', 'gutentor' ),/*Author Name*/
         'keywords' => array( 'about-block', 'about 3' ),/*Search keyword*/
         'categories' => array( 'about' ),/*Categories*/
         'template_url' => 'https://www.doamin.com/gutentor-block-or-template.json',/*Json file url */
         'screenshot_url' => 'https://www.doamin.com/gutentor-block-or-template.jpg',/*Screenshot of block*/
         'demo_url' => 'https://www.demo-doamin.com/',/*Demo Url*/
      ),
   );
   return array_merge( $templates_list, $my_templates_list );
}
add_action('gutentor_advanced_import_templates','prefix_add_own_templates');