3rd Party Server, conforme a documentação do GCM:
http://developer.android.com/guide/google/gcm/gs.html
Dependências do Projeto:
Python GCM Client forked from geeknam
https://github.com/thiagopa/python-gcm
SUDS modified to work in GAE (my github version)
https://github.com/thiagopa/suds
App Engine SDK
https://developers.google.com/appengine/downloads#Google_App_Engine_SDK_for_Python