Information about the GMC For more information about the GMC, click one of the following items. Company Information about our products, services and market areas. Your way to GMC If you have any questions, we are also at your disposal at our location in Wesseling. Logistics Our central IT-supported spare parts warehouse stocks more than 16,000 items on an area of more than 2000 m². Career If you are interested in engines, commercial vehicles and logistics, you have come to the right place.