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.

Justin Kopepasah

A simple WordPress plugin that adds a gist shortcode for getting a single Gist and the files within. It uses the Gist V3 API. Has the option for authentication via Personal Access Token.
Usage 
Get a Gist using a WordPress shortcode: <code>[gist id=00000000 file=file-name.php]</code>
The Gist will return as plain text. I recommend using WordPress plugin Syntaxhighlighter Evolved to highlight the Gist. See below for details.
Visit [Get Gist on Github](http://https://github.com/kopepasah/get-gist “Get Gist”) for more options and information.

Get Gist

A simple WordPress plugin that adds a gist shortcode for getting a single Gist and the files within.

GitHub Gists Sidebar Widget vs Get Gist