GameStop have gone public and added GTA 5 for the PC and so you can be certain that it cannot be too far away from being released. The PC version of GTA 5 was seen on the PowerUp Rewards part of the site, which is a rewards system for those making purchases through the website.
It is worth noting that GameStop have not revealed the release date for GTA 5 for the PC, even though pre-orders are being taken. Rockstar still haven’t said anything about porting the game over either.
Gamers have been demanding loud and clear that Rockstar deliver GTA 5 for the PC and a petition was got up. So it seems that maybe Rockstar could announce something in the future.
