Yes you can. Gift cards come from our partner GiftCards.com. They provide both physical cards that can be mailed to you or eGift Cards that are emailed to you.
Online you can redeem your gift cards by entering in the code at checkout
At a store you can print the gift card or provide the code from your phone to the cashier at checkout.
(Note: Don't forget you can double dip and purchase gift cards for your online shopping earning more for your cause.)