Please stop - even his parents wouldn't say he's agile. Yes, he works hard and he has some skill, but c'mon, he can barely jump, he's slow, and he's not quick to the ball if there's a rebound to to be had that he needs to move for.
Gettys is not "athletic"... but I would also say he's pretty agile for a guy his size. He's got pretty good footwork, rarely travels, can actually handle the ball in the open court, and can make drives from the top of the key for layups. He also dives for loose balls, and springs back up from the ground quickly when knocked down. He's never going to have hops, or be able to contort his body in the air... but that's more raw athleticism than agility.
Can't compare his agility to a guard, or even a forward... in the broader sense of "agility", he's low on the scale. But among guys who are 7' tall and 280 lbs, I'd say he's above average in that area.