In early 2010, the board of governors announced that from September 2010, the former head of Rhydywaun School would take over from Rhiannon Lloyd.

This split-site arrangement continued until the opening of Cardiff's second Welsh-medium comprehensive school, Ysgol Gyfun Gymraeg Plasmawr, in 1998, from which point the Llandaff North site again housed the entirety of Glantaf's pupils.

Ysgol Glantaf presents sixth form students for the Welsh Baccalaureate examination.

The school's motto is Coron Gwlad Ei Mamiaith, which translates to 'A Country's Crown is Her Mother Tongue'.

[3] In 2019, Ysgol Gyfun Gymraeg Glantaf was named Welsh Secondary School of the year by the Sunday Times.