I have new information about the next GTA. I'm in contact with a guy that works for R* he sent me these two pics. He also gave me more details.
I know we're all waiting for a new Vice City game. But R* is starting something new.
To keep it short :
The next GTA location will be Honolulu, Hawaii. There will be more open land than in GTA SA. Some small islands arround O'ahu will be in the game.