Well, one GTA community member thought so to such an extent that they're currently busy re-creating what we've seen of the map so far in GTA 5, as a mod that Rockstar will hopefully be cool with.

While we’ve yet to see what Grand Theft Auto 6’s map is going to look like, it seems likely that it will take a roughly similar approach, with one large central city and some more rural areas ...

Rockstar gave us our very first look at what's sure to be ... GTA 6 will explore beyond the borders of Vice City with a larger map that incorporates the Florida Everglades and even smaller towns ...