Figured I'd better research that. Don't see that Gailey ever spent time in Alabama. Nice try.
Gailey was a three-year letterman at Florida, a QB. He stayed at Florida two years as a graduate assistant and then got a job at Troy State as the secondary coach. That's how he got his start.
Bryant retired in 1982, while Gailey was coaching at the Air Force Academy.
But yeah, he does know his football. That's why he's generally considered one of the best OCs in the game.