GAP Co. has started their Give and Get charity promotion. Get a multiple-use barcode and a one-time-use online code good for 30% off at Gap, BR, and Old Navy stores. 5% of proceeds also go towards charity. (I've selected the World Wildlife Fund.)
You can sign up here, but if for whatever reason you have a problem, email me and I can forward you a set of codes. Ends Sunday Mar 20.
I think you should be able to print out the image below to shop in-stores.