I just discovered we have map (x13) and maps (x7) tags. Though it looks like the latter mainly deals with "map applications" (mostly Google Maps), while the former is used for "map material", I'd suggest to...
re-tag all "Google Maps" related questions to google-maps (another existing tag) if they are not referring to the map material but to the app only
merge maps with map
optionally make the empty one a synonym to the other