In the past few hours Rockstar Games has announced through its own Official site la permanent shutdown of servers PS3 and Xbox 360's GTA Online. 

The shutdown of online services will happen next 16th December and will apply to GTA V, LA Noire and Max Payne 3. Obviously, this will not impact the ability to play these titles in offline singeplayer.

Rockstar justified the decision to terminate online services for the seventh generation console so you can focus on providing more updates to versions of the eighth and ninth gen of GTA V (the latter will arrive later this fall). Unfortunately DON'T It will be possible to transfer the progress of GTA Online to PS4 and Xbox One, and therefore all virtual currencies and Shark Cards in the PS3 and Xbox 360 accounts will be lost starting next December.