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

jamqes

Lightweight widget shortcodes to display GitHub buttons and gists on your blog. Includes shortcode for embedding GitHub hosted gists and buttons for:
<ul>
<li>Follow</li>
<li>Watch</li>
<li>Star</li>
<li>Fork</li>
<li>Download</li>
<li>Issue</li>
</ul>
The plugin implements <a href="https://github.com/ntkme/github-buttons" rel="nofollow ugc">ntkme’s ‘github-buttons’</a> and GitHub’s gist display as shortcodes.
<h3>Usage</h3>
GitHub Follow Button: 
Add the <code>[Github_User_Button user='JBarnden' size='large' show_count='true']</code> shortcode in your content and replace <code>JBarnden</code> with the desired GitHub username.
GitHub Repo Buttons: 
Add the <code>[Github_Repo_Button user='JBarnden' repo='wp-github-widgets' size='large' show_count='true']</code> shortcode in your content, replacing <code>JBarnden</code> with the desired GitHub username and <code>MyRepo</code> with the desired repo belonging to the specified user. 
You can set the<code>type</code> attribtute to <code>watch</code>, <code>star</code>, <code>fork</code>, <code>issue</code> or <code>download</code>.
Display Gist: 
Add the <code>[Gist]gist_id[/Gist]</code> where <code>gist_id</code> is replaced with the id of the desired Gist.
More detailed documentation can be found <a href="https://github.com/JBarnden/wp-github-widgets#usage" rel="nofollow ugc">here</a>. If you find the plugin useful or have any feedback I’d really appreciate your review.
<h3>Feature Requests and Contributions</h3>
Please submit feature requests and contributions via the issues section of <a href="https://github.com/JBarnden/wp-github-widgets/" rel="nofollow ugc">the plugin’s GitHub Repository</a>. 
If you feel like improving the plugin, pull requests are both welcome and appreciated.

Widget Shortcodes for Github

Lightweight widget shortcodes to display GitHub buttons and gists on your blog.

oEmbed Gists and Files vs Widget Shortcodes for Github