KING OF PRUSSIA and PITTSBURGH, Pa., Dec. 16, 2008 – GSI Commerce Inc. (Nasdaq: GSIC), a leading provider of e-commerce and multichannel solutions, today announced a multiyear extension and expansion of its e-commerce agreement with General Nutrition Corporation (GNC), the largest global specialty retailer of nutritional supplements.  Under the agreement, which runs through 2017, GSI will continue to provide GNC’s online store (www.gnc.com) with e-commerce technology, order management and customer care operations.