The meaning of GS is that safety has been certified, and it also means German safety. GS certification is a voluntary certification based on the German Product Safety Law (GPGS) and tested in accordance with the European Union standard EN or the German industrial standard DIN. It is a recognized German safety certification mark in the European market.
The VDE Testing and Certification Institute in Offenbach, Germany is a research institute affiliated to the German Institute of Electrical Engineers and was established in 1920. As a neutral and independent organization, VDE laboratories inspect and certify electrical products in accordance with German VDE national standards, European EN standards, or IEC International Electrotechnical Commission standards based on applications. In many countries, the VDE certification mark is even more famous than the domestic certification mark, especially recognized and valued by importers and exporters.