My daughter has been struggling with GA since right before her Type 1 Diabetes diagnosis in 2012. Hers is on her lower legs, so it can be hidden with pants or long socks, but she still is self conscious about it. We somehow decided to try Noxema on it a few years ago. The spots, which were large, deep, and very red are now mostly skin colored and look more like scars. Some spots have disappeared and all remaining ones are much smaller and lighter. She puts the Noxema on before bed when she thinks of it (she's a teen so consistency is not at it's finest) and just leaves it on. She also has vitamin E oil she puts on as well.
While this remedy seems to be working at a snail's pace, it is working. At the rate of improvement we are seeing, hopefully in a few years her legs will be all clear.