GEMME, the Groupe d’Étude du Modélisme à Voie Métrique et Étroite, is an association for people interested in railway modelling inspired by metric- and narrow-gauge railways. It brings together enthusiasts in France and abroad, offering opportunities to share knowledge, ideas, and a common passion. The association does not prescribe a particular modelling scale or technique: members can explore railway vehicles, structures, and layouts, and create models using materials such as metal, plastic, or wood, with specialist or more basic tools.

GEMME supports its community through a member forum, which is also open to visitors and can serve as a first introduction to the association. Members can access the association’s activities and resources, while the website provides news, a newsletter, photographs, and information about joining. The group also arranges opportunities for members to meet, including online gatherings, and public events focused on modelling. GEMME is run through the commitment of its members and encourages anyone who enjoys its community and resources to become a member.