[1] He was educated at Shrone and Meentogues National Schools and at St. Brendan's College in Killarney.

[2] He earned second class honours bachelor's and master's degrees from the Royal University of Ireland.

After his ordination, he taught Irish, English, classics, and mathematics in three different Jesuit colleges, including Clongowes Wood College, a Jesuit boarding school near Clane, County Kildare.

He was a leading figure in the Irish Texts Society, publishing editions of Geoffrey Keating's Foras Feasa ar Éirinn, poems by Aogán Ó Rathaille, Piaras Feiritéar, Tadhg Gaelach Ó Súilleabháin, and other poets.

[5] Dinneen's request to the Irish Texts Society to include Gogan's name on the title page was refused.