Thyme & Season - Natural & Organic Health Food Store (thymeandseason.net)
Whole Foods has a great selection of labeled GF Certified groceries.
I had a lot of luck finding many wonderful gluten-free certified groceries here! I go there at least once a week!
Stop & Shop has a wide variety of gluten-free products available throughout the store. Look in the nature promise aisle, refrigerator area, and other products throughout with Certified Gluten-Free labels as seen on the "My Friend's Favorite Resources" page.