I'm running a local stand-alone datastore emulator using the gcloud tool:
$ gcloud beta emulators datastore start
It works fine, but I'm missing the integrated /_ah/admin page the old appengine dev server offers. Is there something comparable for this emulator? A stand-alone project that just acts like a phpmyadmin, or a trick to reuse the appengine dev server's GUI; I'm fine with either.
Currently there is no GUI available to view/manage the data created through the Emulator. There is an open enhancement request for this at - https://github.com/GoogleCloudPlatform/google-cloud-datastore/issues/148.