gistfile1.html

<script type="text/javascript">
  $(document).ready(function(){
    $('.gistinclude').each(function(){
      var gistLocation = $(this);
      $.getJSON('http://gist.github.com/'+$(this).attr('data-gistid')+'.json?callback=?', function(data){
        gistLocation.replaceWith(data.div);
      });
    });
  });
</script>