Gregory Welteroth Advertising (GWA) is a privately-held advertising and media buying agency that specializes in cooperative, retailer-based programs and national branding campaigns. Located in central Pennsylvania, GWA has spent the past 25 years working with national and international brands to create marketing programs that increase sales and brand awareness. GWA currently represents brands such as Ariens®/Gravely®, Bosch®, Champion®, Cub Cadet®, Honda® Power Equipment, Kubota®, Siemens®, STIHL®, and Thermador®.