User blog comment:Doctor.wii/THE AMAZING WORLD OF GUMBALL RENEWED FOR A THIRD SEASON!/@comment-2068024-20121005122427/@comment-4346684-20121006045914

Nope, its legit. A real thrid season.

“We’re really thrilled to greenlight a third season of our debut series from Cartoon Network Studio Europe. Season two has already seen a big leap in terms of comedy and visual storytelling and we’re excited to see where we can go with a third season"

The real executives dont refer to the Second half of a season as a 'different season.' And half a season wouldnt need to be green lit anyways. This comes as no surprise, of course Gumball would get a third season.