Jekyll plugin to add Git activity inside a list

git.rb

require 'git'

module Jekyll
  class GitActivityTag < Liquid::Tag

    def initialize(tag_name, text, tokens)
      super
    end

    def render(context)
      result = ""
      g = Git.open(File.join(Dir.getwd, ".."))
      
      index = 0
      g.log.each do |log| 
        if(index < 10)
          result << "<li>" 
          result << log.date.strftime("%d %b")
          result << " - <a href='http://git.tetalab.org/index.php/p/jekyll/source/commit/"
          result << log.sha
          result << "/'>"
          result << log.message
          result << "</a></li>"
          index += 1
        end
      end
      "<ul>#{result}</ul>"
    end
  end
end

Liquid::Template.register_tag('gitactivity', Jekyll::GitActivityTag)

I configured Jekyll on a Github Page.
Can I have a ultra-detailed how-to about how to include this plugins to make it work on my site, configured as written above?

@streambinder You can still use plugins on gh-pages, but you have to push the static files instead of the Jekyll files.