Hi emjay00! GCash American Express is our virtual card geared towards international online shopping and the purchasing of mobile apps and in-app purchases. GCash MasterCard on the other hand is our reloadable prepaid card that you can use for shopping in all places that accept MasterCard.
If you'd want to avail of GCash, we recommend downloading the GCash app and creating an account. You can also check http://www.globe.com.ph/gcash for more info.