GS means German "Geprufte Sicherheit" (Security Certified) and also means "German Safety" (German Security). GS certification is a voluntary certification based on the German Product Safety Act (GPGS) and tested according to the European Union Unified Standard EN or German Industrial Standard DIN. It is recognized as a German safety certification mark in the European market.

The GS logo is a safety symbol accepted by a large number of European customers. GS certification products usually sell at a higher price and sell better.

GS certification requirements for products and documents: - products must pass the type test of European safety standards. - the product structure must conform to the standard requirements. - Specifications (German, English) must be up to standard. - English documents such as Structural Diagram, Circuit Diagram and Parts List prepared according to TUV requirements will be tested according to the parameters provided in these documents.

GS certification has strict requirements on the factory quality assurance system, the factory to review and annual inspection: the factory in the batch shipment, according to the ISO9000 system standards to establish their own quality assurance system. Factories should at least have their own quality control system, quality records and other documents and adequate production and inspection capabilities. - before issuing the GS certificate, the GS certificate will be issued only if the new factory is reviewed. After issuing the certificate, there are at least 1 checks per year for the factory. No matter how many products the factory signs for GS, the factory censorship only needs 1 times.

Differences between GS certification and CE certification: