title: Does Google Cloud Messaging (GCM) work with Kindle Fire?
body: <p>C2DM required a Google ID, and now C2DM has been replaced by GCM which apparently does not require a Google ID.</p>
  
  <p>Does this mean it is simply compatible with devices (such as the Kindle Fire) that does not have Google Play Appstore or the Google stack available to it?</p>