Gibson injured his hand blocking downfield, something that he had been criticized for earlier in the season. Gibson had ligament damage to his thumb when his thumb got caught in the ear hole of a Vanderbilt defender.
Musa Smith has a broken thumb and, like Gibson, will have surgery at St. Mary's Hospital in Athens Tuesday morning. It is not clear when Smith's injury occurred.
"Other guys are going to have to step it up now," said Georgia head coach Mark Richt of the situation.