Yes but you must enter the GC number manually for
LL purchases. You can't save your GC(s) as payment method in
MDE. Also if you have a saved payment method make sure that you read the screen in payment step where you enter your GC number. It does add a little time to the payment step for LL purchases.
For
DDP and Memory Maker pre-payments you will need to manually enter your GC(s) manually.
Generally it is best to save your GC number in a Note on your smartphone to allow you to cut / paste as you go through the payment steps.
Dave