Here's how we implemented Mercury gift cards to sell through our webstore.
1. Create items in RMS for the values you wish to sell. We created 5 and named them GC10, GC25, GC50, GC75, GC100. These correspond with the values $10, $25, $50, $75, $100.
2. Make sure that you have Mercury's gift card software installed on the POS computer that you use GWO on.
3. When you process the order at the POS it will ask you to swipe the gift card when you go to the tender screen just as if you sold it in you bricks and mortar.
4. One major caution, If someone orders multiples of the same gift card you will need to change the quantity of the item to 1 and add new items for each of the additional gift cards. Each card need to be on its own line to trigger the software correctly.
This only works for creating new cards. To add money to existing cards you'd have to do that through Virtual Terminal on Mercury's web site.
I hope this helps,