On GTA 5 was already known during GTA 4
Yes, it did not sound, but for 3 years we have known about the trailer of GTA V and learn about him, we could from the fourth part GTA. On the screenshot, the amusement Park where I see a big Billboard of the trailer.
Striking similarities... Coincidence? Hardly. This suggests that the development of the game began with the work on GTA IV.
The plane Shamal, Hydra , Skyscrapers all like "copied" from the trailer. Perhaps the output of the highly anticipated game will be sooner than we think, since I work for a long time?
To check this, watch the trailer and review at their own game: