Andy Fragen

Colin Stewart

Use an Embed block and enter the URL for the Gist or the URL for a specific file within the Gist. If using the Classic Editor, place the URL on a line by itself. Not as a link.
Support for <code>wp_oembed_get()</code>.
No shortcodes.

oEmbed Gists and Files

Andrew Norcross

A sidebar widget to display your public gists from GitHub. Allows for optional display of creation date and link back to your GitHub profile page. Uses v3 of the GitHub API.
<h3>Potential Enhancements</h3>
I plan on including the Transients API in an upcoming release…once I figure out exactly how they work. Otherwise, feel free to suggest.

GitHub Gists Sidebar Widget

A sidebar widget to display your public gists from GitHub.

oEmbed Gists and Files vs GitHub Gists Sidebar Widget