× reliable - thorough - quality conscious GSS Gebäude-Service Sommer UG is a young and modern company that can fall back on many years of experience in building cleaning. We would be very happy to hear from you. Peter Sommer Managing Director GSS Gebäude-Service Sommer UG (limited liability) Reuterstraße 120 51467 Bergisch Gladbach Telephone: 022 02/10 83 99 Fax: 022 02/10 83 66 Mobile: 015 73/942 54 33 info@gss-gebaeudeservice.de www.gss-gebaeudeservice.de