The Landing used to be absolutely insane for Florida vs. Georgia... and in it's own right, it still is. However, in the last few years they've started charging $20 cover to get in, so that's deterred a lot of people. Don't get me wrong though, it's still an awesome atmosphere, especially if you've never been.
Other places that might be good to actually watch the game if you don't want to go to the Landing (which has a huge jumbotron set up outside to watch the game for free), you can try either Sneakers locations (9A/Baymeadows or at the Beaches). Sneakers is a huge sports bar and always packed for Gator games.