Pupils at the school are taught completely in Welsh and come from a range of Welsh-language feeder schools from 4 different counties; Torfaen, Blaenau Gwent, Monmouthshire and Newport.

The aim is to immerse pupils in Welsh and to enable them to be educated entirely in it as their native language.

The number of new pupils enrolled at the school has fallen every year since 2016, when the new Ysgol Gyfun Gwent Is Coed opened in Newport, shrinking the catchment area of Gwynllyw.

The same report also says that all pupils speak Welsh as a first language or to an equivalent standard.

This Welsh school or sixth form college related article is a stub.