GeForce G110 (rebranded 9400GT):
GeForce G120 (rebranded 9500GT):
GeForce G130 (rebranded 9600GSO):
More information is available, and discussion on the changes, on the sourced forum thread.
It’s been quite a while since Nvidia rebranded its cards and we were beginning to think it has dropped the habit altogether. However, several leaked ads, courtesy of German retailer MediaMarkt all but confirm the new naming scheme.