Gemeinschaft Thermisches Spritzen e.V. (GTS), the Association of Thermal Sprayers, has built up its excellent reputation and success on a sophisticated and, at the same time, transparent quality assurance network with replicable and comprehensible implementation procedures for thermal spraying. For this reason, along with its thermal spray marketing activities, GTS is deemed an important guarantor for this surface technology. This paper provides an overview of the GTS documents and related GTS workflow and procedures compiled for this purpose. Information on quality assurance provided by GTS papers and by the GTS certificate is also provided. The paper also covers activities and member services associated with GTS.