The GUS promotes the development of environmental simulation on a non-profit basis, e.g. through professional exchange. For this purpose it organizes conferences, seminars and forms working groups. It mediates contacts with environmental laboratories as well as between users and manufacturers of environmental simulation equipment and the associated measurement technology. Members of the GUS hold advanced and advanced training courses and participate in specialist committees. The members and their representatives work on a voluntary basis. The GUS is financed through contributions and donations.