Embed Gists in wordpress via shortocde

gist.php

// Place this code in your functions.php 
// Then when you want to embed a gist, use [gist GISTID] and it will show up in your post
function embedGists( $atts ) {
	$gist = $atts[0];
	$string = '<script src="https://gist.github.com/'.$gist.'.js"></script>';
	return $string;
}

add_shortcode( 'gist', 'embedGists' );