Back-to-back birdies in holes No. 11 and 12 got Gahman back to 4-under and a tie for the lead with Blumberg and Behr.
After Blumberg and Behr both made bogey on the par-3 17th in the group ahead to fall back to 3-under-par, Gahman was back on top of the leaderboard heading into No. 17. Playing a group ahead, Behr birdied the par-5 18th to draw even and when Gahman was unable to get up-and-down from the back of the 18th green, the two players returned to the 18th for a playoff.
Both players had birdie chances, but it was Gahman who was able to convert from 12 feet out to capture his second straight Georgia Mid-Amateur title.
With rounds of 70-71-71, Gahman was also the only player to finish under par in each of the three rounds.
