I am using the Go runtime on GAE (Managed VMs) with Datastore. Just recently I found this page that talks about Types and Property classes in connection with the Python runtime and Expando.
I would like to use queries against ListProperties from Go. Is that possible? Of course I know that google.golang.org/appengine/datastore does not expose this feature.
The golang datastore API supports list properties as far as I know. So you should be able to have a property that is a ndb.StringProperty(repeated=True) in python and []string in go and they should interoperate fine.