GTA 6 is a game that Rockstar hasn't officially announced yet but many people are talking about it. The question many people have about the game is what Rockstar plans to do about the location for the game.
Although they have not officially announced anything, many people have been speculating about the location of GTA 6.
Because GTA 4 and 5 took place in Liberty City and Los Santos respectively, people have already axed those to cities off the list. This leaves Vice City and possibly London as two probable locations for GTA 6 if Rockstar planned on using an older location from their GTA universe for the sixth game in the series.
As far as new locations go, many people now suspect that Portland, Oregon will become next location in the GTA series. This is because there are a number of good features that make the city a good location for Rockstar.
The only downside for Portland, Oregon is that the city doesn't have any large neighboring cities, which can make it difficult to set a game there. Every GTA game has slowly expanded the setting of the game, which means that having a single city or location isn't good enough anymore.
Grand Theft Auto: San Andreas expanded the size and scope of the series in a big way, including most of Los Santos that we know and love today.
There is also the question of what Rockstar will do with GTA Online. Currently, GTA Online is their online portion of Grand Theft Auto 5.