Found that it is reversible, you can find about it in their terms of service here
https://www.goldmoney.com/terms-of-serviceYou must be aware of the following risks of using the Goldmoney Services: Transactions in which you receive a transfer of title to gold from another user may be reversed, for example, if the transaction is subject to a Chargeback, reversal, claim, or is otherwise invalidated. This means that, for some of our users, transfers in the form of a transfer of title in gold may be reversed after the users have provided goods or services.