Google gadget for embedding Gist.

gist-gadget.xml

<?xml version="1.0"?>
<Module>
  <ModulePrefs title="Gist">
    <Require feature="dynamic-height"/>
  </ModulePrefs>
  <UserPref name="id" display_name="Gist ID" required="true" default_value="10683373"/>
  <UserPref name="font_size" display_name="Font size (px)" required="true" default_value="12"/>
  <UserPref name="line_height" display_name="Line height (px)" required="true" default_value="16"/>
  <Content type="html">
<![CDATA[
<style type="text/css">
body, td, div, span, p {
  font-family: Consolas, "Liberation Mono", Courier, monospace;
  font-size: __UP_font_size__px;
  line-height: __UP_line_height__px;
}
.gist .gist-file .gist-data {
  background-color: white !important;
}
.gist .gist-file .gist-data .line-numbers {
  background-color: white !important;
}
</style>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="https://gist.github.com/__UP_id__.js"></script>
<script>
$(function() {
  $('.gist-meta').children('a').attr('target', '_blank');
  gadgets.window.adjustHeight();
});
</script>
]]>
  </Content>
</Module>