That formation is known as the "heavy package" that utilizes five defensive linemen and two middle linebackers in order to suffocate the running game.
For those of you who are curious here is a picture of a basic 5-2 look. Originally the nose tackle was called the middle guard and recorded as many as 100+ tackles (Murray Legg anybody?) It should be noted that this is the defensive formation that Alabama ran under Coach Bryant in the 1970s. Looking at our formation which normally includes McElroy under center or in the shotgun (this part is important) and one back in the backfield, I would guess that the nose tackle in this formation would be on the strong side eye of the center the weak side defensive tackle in the gap between the center in the weak side guard and the other defensive tackle in the gap between the strong side guard and the strong side tackle. Both defensive ends would be on the outside eye or head up the tackle on their respective sides. The linebackers would probably shift to the side of the tailback if he's next to the QB in the shotgun.
This is interesting because one of the most effective things Alabama does as an offensive line in my opinion is pull an opposite side guard and lead him in the hole ahead of Ingram and Richardson. To an extent, this makes it more difficult to do because of the lineman. It would reason that most of our runs would have to come outside the tackles. What this would lead Florida susceptible to is screen passes or flare passes to the 'backs out of the back field as I'm not sure the Gators have a linebacker fast enough to cover Ingram or Richardson in the flat. They would almost have to use a strong safety to guard against that which would leave them open to the deep pass.
All in all, I'm not sure this would be an overly effective and wonder if Meyer allowed this to be leaked. Yes it would bottle up the inside run game to an extent but at the price of opening almost everything else. It would leave Maze, Hanks and Julio in one on one situations and even possibly a receiver on a safety match-up that would almost certaintly result in a huge play. However, what it does do is make McElroy make the right pre-snap read. Ingram's vision would also be a huge factor against this. Another point is that with so many players close to the line of scrimmage, once you break that first layer there's alot of daylight to work with.
This is my first major fanpost so your comments and help are appreciated