Well, one of the initial comparisons I found was of Brenden Morrow, which I think makes sense. Gaunce is a little bigger than Morrow, but both are great leaders and contribute a lot to their teams that way. He will likely have some pretty good seasons of point production (Morrow had two great seasons of 74 and 65, but otherwise he was a 40-50 point guy), but will be most useful due to his all around game.
If his offence continues to develop, it's possible he even gets to a 1st line center role, but more likely a 2nd line center who's very capable on the 3rd or 4th.
Gaunce was a +1 in a 3-1 win over the London Knights, the OHL's top team, last night. That puts the Bulls at 3rd overall and 2nd in the East.