WordPress Gist Shortcode Examples for Jetpack v2.9. More info at http://tourkick.com/2014/least-5-ways-embed-gists-wordpress/
https://gist.github.com/cliffordp/1234567
[gist file="file-x.php"]https://gist.github.com/cliffordp/1234567[/gist]
[gist https://gist.github.com/cliffordp/1234567 file="file-x.php" /]
[gist]1234567[/gist]
[gist https://gist.github.com/cliffordp/1234567 /]