Before you return any items to GAP you should check the Returns Policy to be sure of the correct process. Returns policies are subject to change so it is worth the time checking them over quickly before you ship an item.
GAP Returns Policy
If you are looking to get a refund from returning your items to GAP, make sure they are in their original condition: unwashed and unworn. Items not in this condition will not be accepted and you will not be refunded. Items which are damaged can be returned at any time. Swimwear must have the original price tags and hygienic liner intact.
Refunds do require proof of purchase to, so include the invoice mailed with your item. There is no cost to return items to GAP, you can send them back free of charge - and you have 45 days from purchase to send the items back. You can return items instore as long as your item is not marked as 'mail only'.