So I've been looking at symbols on the google machine.
It looks like this may be some kind of pagan or Wicca symbol.
Depending on the orientation of the image it might have something to do with "air" or "earth".
But who really knows?! Except the person that drew it.
But if the sole owner has no idea about it, Sweetwater either then it is hard to determine why it's there and who actually put it in there in the first place.
Doesn't seem like something the Gibson Custom Shop would do?!
Interesting.