Originally built in 1897 as the County School of Dolgellau. Much of the existing buildings were built later in 20th century. Under Welsh Government's 21st Century Schools Programme, the school closed in 2017, amalgamating with Ysgol Gynradd Dolgellau, Ysgol Brithdir, Ysgol Ieuan Gwynedd (Rhydymain), Ysgol Dinas Mawddwy, Ysgol Llanelltyd, Ysgol Friog, Ysgol Clogau (Bontddu) and Ysgol Ganllwyd to create new all-through school for 3-16 year olds - Ysgol Bro Idris (Y Gader catchment area) - on site.
M. Powel, RCAHMW. November 2022.