The Peer Support Groups, for many known colloquially as GAM, have already become an effective tool in improving a problem or difficulty from mutual support. The starting point is always the fact of sharing a similar situation (be it an illness, a mourning process, an addiction …) and the desire to try to overcome it or improve the situation. Starting from here the possibilities of work are endless, as long as they are well managed and energized. For this reason, from the Activa’t per la Salut Mental project, we wanted to work on its systematization and we have done a diagnosis and produced support materials that we are sure will help promote, not only mental health GAMs, but all GAMs that work in any field.