friesbandit, you can, just apple the code you can see the discount (max i can get is 20%) during checkout, no need to place order.
GAP 20% off code
"FORYOU" or "FRIEND"
*Offer valid from 10/26/2009 at 12:00 am ET through 10/29/2009 at 11:59 pm ET in the U.S. only (including Puerto Rico) on Gap merchandise purchased online only. Not valid at Gap stores and Gap Outlet. Discount applies to regularly priced Gap merchandise only, not value of GiftCards purchased, packaging, or applicable taxes. Not valid on Gap (PRODUCT) RED™, Junk Food™, Converse®, Robeez®, Medela®, Charm It!®, Havaianas®, Stella McCartney for GapKids/babyGap, or babyGap home merchandise (bedding, blankets, strollers, car seats, high chairs, diaper bags, toys, books, nursery décor, dishware, bath accessories, nursing accessories, bibs, and skincare). Offer valid for one time use only. No adjustments on previous purchases. Not valid for cash or cash equivalent. Cannot be combined with other offers. Offer is not transferable.