[Answered ]-Django 1.5.1 support from Google App Engine

Provided you are using Cloud SQL as your backend and not the datastore, you should be able to use your own Django. You might need to do some work in tweaking the database settings.

App Engine provides up to django 1.4, so you can use that if you don’t want to install your own.

If you want to use the datastore, you’ll have to use django-nonrel. I believe there is an experimental branch that’s up to 1.5 if not 1.5.1