Hello! Just found a solution for while. I’ve tested a lot and the solution is:
Deposit 1 gold
Withdraw 1k (if youre not able, then try 500g)
Deposit 1 gold
Withdraw 2k
You can swap between deposit 1 gold and withdraw the 2x your last withdraw, it worked for me. I took all 2.8 million gold from my guild bank, tested it a lot of times and worked. May it works for you guys!!