I doubt anything will happen to this game. Just about every GTA game in the past has some kind of opposition whether it be against guns, violence in general, or sexual exploitation. The worst that we've seen is court cases where violence in video games is not considered to be the cause of such violence in the real world.
In all honest, with as much as games have evolved in the past decade, they still don't do anything different than what's seen in most action movies, some of which get replayed on broadcast television for wide audiences to see at home. So there is no way that video games in general can be banned, unless they do something specific like require you to kill a classroom of children or the President or something.