IMO it's a close call between him and Fromm.
The media has always viewed Fromm as the best, but it's just so much easier to look good when you're surrounded by an elite team versus having an O-line that caves in immediately. That said, our O-line is definitely improving and we're starting to see what JG can do when he has time to throw.
At the very least, as I've said all year, JG is one of our best weapons on offense. Almost all the criticisms of him have been off-base. Even Peyton Manning would have looked like crap behind this O-line for much of the season.
The only "bad game" JG has had all year was Florida IMO.