Johnson plans to make his announcement after a Monday meeting with Coach Mark Richt, he said Saturday.
If the victory over Virginia Tech was his last game, it was a heck of a finish. Johnson had two sacks, three tackles-for-loss and forced a critical fourth-quarter fumble.
Junior cornerback Paul Oliver, who also is considering leaving early, declined to comment on his status after the game.
"It's all about the game," he said.
Junior running back Danny Ware also plans to announce his decision Monday, he said.