We all used our gift cards for food. You can use Disney gift cards almost everywhere on property so we used ours for lunches, dinners, merchandise, even ice cream. Hopefully they'll do the same thing for you guys and just give you a gift card when you check in to the hotel.
Here's a list of all the places you can use Disney gift cards:
http://www.disneygiftcard.com/where-to-use/. One thing we did find at
Disneyland was that you couldn't charge things to your hotel room at Downtown Disney like you can at Disney World. My boys only wanted to buy
Lego but they don't accept Disney gift cards at the Lego store at DTD and we weren't able to charge it to the room. Not a big deal though.