GAZ has about 600k entries representing different geographic entities, from the Mariannas Trench to Minnesota.
Efforts on GAZ have restarted after a period of hiatus. Lynn Schriml has been assigned contact for GAZ. A group of us are attempting to work through various issues on the tracker, including figuring out a better way to manage GAZ in GitHub, linking GAZ to ENVO, and integrating GAZ with Wikidata (and from there, other resources like Geonames).
You can follow the tracker here: