The popular CMS Drupal is going to have Gutenberg blocks and their team is already working on the full integration of this new beta WordPress editor in Drupal.
You probably already know it, but we’re going to repeat it. Gutenberg began as a transformation of the WordPress editor — a new interface for adding, editing, and manipulating content. It seeks to make it easy for anyone to create rich, flexible content layouts with a block-based UI.
All types of page components are represented as modular blocks, which means they can be accessed from a unified block menu, dropped anywhere on a page, and directly edited to create the custom presentation the user wants.
As Drupal.Org has stated, Gutenberg comes with 20+ core blocks, and so does Drupal core. This means all existing Drupal blocks available in the Gutenberg UI can be inserted into a page wherever you want, alongside Gutenberg core blocks. And of course, you can extend them or build your own.
In the first release Drupal ship blocks like Drupal core blocks, Your custom Drupal blocks (like Views), Heading, Latest posts, Paragraph with size and color options, Auto embedded social posts, Image gallery, Layout blocks, Buttons, Etc.
Check out their official website HERE