In my search here, it looks like Galland did fly a BF-109F-2, and i managed to run across a picture of that. While not the G model, i'm guessing that may not help you out much here.
Not sure how accurate this is, but it seems that the Franklin Mint thinks he flew one. They even made a die cast of his plane:
http://www.fantasticflyers.com/109g-adolf-galland-luftwaffe-iiijg-b11b189-p-636.html
Wish i had something more concrete to help you out. But that's all i'm running across here. Hest of luck!