[2] Gun is part of the Fon dialectal cluster within the Eastern Gbe languages; it is close to other Fon dialects, especially its Agbome and Kpase varieties, as well as to the Mahi and Weme (Ouémé) languages.

It is mainly spoken in the south of the country, in Porto-Novo, Sèmè-Kpodji, Bonou, Adjarra, Avrankou, Dangbo, Akpro-Missérété, Cotonou, and other cities where Ogu people live.

It is also spoken by a minority of Ogu people in southwest Nigeria near the border with Benin, particularly Badagry, Maun, Tube.

[clarification needed] In Benin, another orthography was developed for publishing a Bible translation in 1923, and it was updated in 1975, and is now used for teaching literacy in some schools in Benin; it is similar to the orthography of Fon, using letters such as ⟨ɛ⟩ and ⟨ɔ⟩.

[5] There are proposals to unify the orthographies, for example the one made by Hounkpati Capo in 1990.