Oh, sorry missed that "development" part. I'm afraid it's not possible. When it comes to managed vms, python local dev server is still not available(java is), so there is no way to know if using same local server will be possible.
I just asked this in #google-containers IRC channel, and ~isdal chimed in to say this is now possible -- "The new gcloud SDK allows you to run multiple docker containers at the same time with all of them sharing the same datastore (and other APIs".