I photographed this in 2015 and can’t recall where in Comer it was located. Gambrel-roof barns are not very common in Georgia, and the number of doors is a bit unusual. I’ll update when I learn more.
Gambrel-Roof Barn, Comer
Vanishing Georgia: Photographs by Brian Brown
Since 2008. A visual survey of Georgia's historic architecture and culture. 8,000 locations. 27,000 images.
Vanishing Georgia: Photographs by Brian Brown 
The blue is unusual, too. It makes a striking building. Maybe it will make it easier to spot on your travels!
I am enthusiastically restoring an old barn in Lexington GA to keep its owners from tearing it down. I believe that saving old barns is saving history and honoring this countries agrarian past. More info on my project can be found online at gf.com/u/x8h8tj