Is it possible to use google web fonts in gmail

I want to use google web font "Over the Rainbow" when composing mail in gmail

 <link href='http://fonts.googleapis.com/css?family=Over+the+Rainbow&v2' rel='stylesheet' type='text/css'>

Is it possible?

<script type="text/javascript">
  WebFontConfig = {
    google: { families: [ 'Over+the+Rainbow' ] }
  };
  (function() {
    var wf = document.createElement('script');
    wf.src = ('https:' == document.location.protocol ? 'https' : 'http') +
      '://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js';
    wf.type = 'text/javascript';
    wf.async = 'true';
    var s = document.getElementsByTagName('script')[0];
    s.parentNode.insertBefore(wf, s);
  })(); </script>