Devean George wasn't going to see any playing time in Toronto. He stinks and to me is pretty much done in the NBA.
Belinelli isn't anything great but clearly more productive at this point than George and is only 23 years old. He'll get some minutes on the Raptors since the only people he'll have to compete with are Derozan and Wright.
I guess GS is just clearing up room and minutes for the rest of their backcourt players? Whatever. It's a win in terms of value and talent for the Raptors. Thanks Golden State.