FGS is an independent, non-partisan and non-profit organisation, not tied to religious confession or ideology. It has nearly 400 members from different fields of the natural sciences, the humanities, and social sciences.
The modalities for joining are laid down in the statutes as follows:' Members of the FGS should be persons with a university degree. At least two-thirds of the members must be made up of scientists who are either currently active in research work, in development or education, or have carried out such work earlier and over a long period of time. New membership proposals must be presented to the executive committee by current members of the society. The committee will then decide on the admission of the proposed new member.'