Here's a 40% off code for GAP.com: Use code GAPSNOW at checkout (thanks jacalynt!).
There is also a 30% off code for Gap.com. Use code GAPHAPPY at checkout for the discount.
Code good through December 9th, online only. There are some exclusions so read the fine print on the website. Free shippign on orders over $50. Click HERE for the GAP website.