Google Cloud Messaging in Unity

Is there a way to enable the use of Google Cloud Messaging (GCM) in a unity game? I already got GCM working in a default java android application, but I don’t get it to work in a unity game.

Is there anything special I need to do, to get it to work.

All help is appreciated.

Thanks in Advance,
Mark

I know this is a very old question, but since it has not been answered, here is my input. If you are still interested on implementing GCM within Unity, check my asset in the Asset store, which can handle messages from and to android devices -and even to iOS devices!

Link: http://u3d.as/content/carlos-fernandez-musoles/easy-cross-platform-notifications

Forum thread: http://forum.unity3d.com/threads/185452-Easy-Cross-Platform-Notifications-available-now!
Hope it helps.

Cheers,
Carlos.