GKS Handelssysteme GmbH Learn more FOSTEC & CompanyReferencesGKS Handelssysteme GmbH GKS Handelssysteme GmbH was founded in Solingen, Germany in 2003 and has since been involved in the development and operation of online marketplaces such as RESTPOSTEN.de, which has been one of the market leaders in the industry for years. Industries: Retail & Trade Visit Website