got banned few days ago for selling gold on 2/2 of mule accounts, third "clean" mule was in the same guild, but when i tried to access GB today found out that they withdrew the remaining gold with the gmaster before banning it, (would even suspect of being hacked) but nothing from the other accounts was touched, first time they would touch a gbank, so be very careful
Blizzard does not withdraw gold with Gmaster. They just remove your guild. 100% the GMaster player withdrew the gold.