Please follow the steps below to resolve why you cannot see your GB Wallet during the checkout:
1. Please make sure that you click “Place Your Order”.
2. Please make sure that you click "Proceed to check out " and not "Buy now with PayPal".
3. If you do not have any balance in your GB Wallet, this option will not be available during the payment stage.
Once you have followed the above suggestions, you should be able to see the Wallet option for payment.