GEMMA is a magazine and a social group founded in 1976 whose mandate is to provide a "friendship and support group for disabled lesbians in England".^[1]

The organisation was founded by members of lesbian organisation Sappho and mixed organisation Campaign for Homosexual Equality, including Elsa Beckett.^[1] Gemma's member newsletter was published in regular print, in braille as well as cassette format.^[2][3]

In her essay Unearthing Our Past: Engaging with Diversity at the Museum of London, Raminder Kaur describes a leaflet promoting the activities of Gemma, which is a part of the Museum of London collection, as "crucial to exploring the theme of multiple identities or difference within difference".^[4]