Daniel Bachhuber wrote a blog post on how to convert a shortcode to a block  to embed a Github Gist into a post. We used it in our post about Lara Schenck's developer talk at Hollywood WordPress Meetup.

Now also available in the public WordPress plugin repository: 

Gist Block by Pantheon

Published by Birgit Pauli-Haack

Curating Gutenberg News since June 2017 web + mobile strategist & coder 4 nonprofits. - Day job @paulisystems Learn more