I owe you a beer and more for this, Stephen. If you happen to come over Manila, buzz me. Maraming salamat!
Heh, some day perhaps, thanks!
I'm curious to see when you do get a GCash transfer where you know the customer is from the U.S. and sent the funds using credit card (or bank transfer) through Remitly.
What I want to caution you on is to make sure you know what will happen in the case where the transaction on the Remitly side gets charged back by the cardholder or the bank transfer (ACH) gets reversed.  
Could you then be exposed to seeing a charge to your GCash (i.e., a reversal of a previous payment) as a result?