Which real-life cities have inspired the major cities of GTA?

Rockstar Games knew they had an absolute goldmine on their hands with GTA 3 and its expansive open world.

What cities are each of the Grand Theft Auto games based upon? - Quora

Universes, GTA Wiki

GTA 5: Los Santos

Visiting GTA 5's North Yankton,Ludendorff In Real Life(Bismarck, North Dakota)- GTA 5 Lore Explained

What cities are each of the Grand Theft Auto games based upon? - Quora

GTA 6 reveal trailer Easter eggs: Vice City references, Florida lore and more - Dexerto

Since a lot of games are based on real cities (GTA V: Los Angeles, etc.), do I have to create my game to be based on a real city? Is it okay

Vice City in GTA III Era - Grand Theft Wiki, the GTA wiki

Grand Theft Auto - Wikipedia

GTA maps and their real life counterparts : r/MapPorn

Why GTA 2's Location is Just Called Anywhere City

GTA 6 Map Leaks & Vice City Location: Where will GTA 6 be set

GTA 6 followers spot clever real-life references in new trailer

What city is each GTA set in?