When I write blogs which explains something using code snippet, i used to add the code directly and blockquote it later i find some plugins which will render the code in the readable format with syntax highlighting, later i used to add code snippet in GIST and embed in post using some plugins, recently i got a chance to read this post 

Which lets you to embed the GIST code in your blog post without any additional plugins with simple steps

  1. Login to WP_admin
  2. In WordPress admin console
  3. Goto Appearance > Editor > Select the current theme and click on functions.php
  4. Paste the below code snippet to your WordPress theme function.php file

https://gist.github.com/61b7f687f249a61e3117

 

and simply add your gist url without the username

Say, if this is my URL https://gist.github.com/asvignesh/61b7f687f249a61e3117

add to post as https://gist.github.com/61b7f687f249a61e3117 which will automatically embed as code snippet

if you want to embed particular file, use file query string  https://gist.github.com/56654ec2130b5271f97a?file=MyClass.java