Rainer Gläß is the G in GK Software. Along with Stephan Kronmüller, presently Chief Technical Officer, he founded the company in 1990. Listed on the stock exchange since 2008, it took over Solquest in 2009. Today GK Software is a leading European developer of standard software for chain store companies. Among others, customers include Kaufhof, Douglas, Coop in Switzerland, X5 in Russia as well as the home furnishings retailer JYSK Nordic.