Short version: Dawgs win. Unless Todd Gurley gets abducted by Manti Te'o's girlfriend. (Again, within the statute of limitations on that one.)
This is Hutson Mason's game to shine. I'll get back to Gurley in a minute, because he's definitely a key to Georgia's victory. But when I reflect on where this program is, truly in transition between one legendary quarterback and his backup who is soon to be a fifth year senior, this is the game after Mason got the jitters out. This is the game after Mason lead his team back from a 20-0 hole. This is the game after the team, the offense and the huddle became his.
As for Gurley, in last season's Capital One Bowl he had 23 carries for 125 yards. He's fully rested and as healthy as he's been since mid-September. He's gonna get his.
On defense things are a little trickier. Grantham won't have Josh Harvey-Clemons or Sheldon Dawson. But the key will be stopping Ameer Abdullah on the ground. He has 59% of the rushing yards for Pelini. They weren't that good through the air with Taylor Martinez. At least not enough to really scare you. And they're a shadow of what they were once he went down with a foot injury in September. So yeh, it's all about stopping them on the ground. It doesn't take a rocket surgeon to figure out that this plays into Georgia's strength on that side of the ball.
Lastly, don't act the fool on special teams.
So, the keys: run the ball, catch the catchable passes, tackle them like you mean it, and don't go batshit crazy when kicking the football. Easy. Peasy. Lemon squeezy.