Gnac has been played on NTS in shows including No Weapon Is Absolute, featured first on 21 September 2022. Songs played include I Think I Think Too Much Too.

Mark Tranmer - who is based in Manchester, England - has recorded under name Gnac (taken from a short story by Italian writer Italo Calvino) since 1996, recording singles for the Earworm and Liquefaction labels.

The first Gnac album, Friend Sleeping, was released in June 1999. This was followed in November by Sevens (on the Rocket Girl label), which was a collection of his previously released 7" singles and new tracks. Through a friend, Gnac's synth-driven cinematic soundscapes came to the attention of Alan McGee, who was then about to form his Poptones label. Gnac's third album, Biscuit Barrel Fashion, was released on Poptones in 2001.

Tranmer continues to provide background music for movies/documentaries and various other occasions, often in the art world; Greek-born conceptual artist Miltos Manetas commissioned Tranmer to provide music for his "Neen" art/social/philosophical "movement."