The construction of a further extension began in September 2007 and was completed in October 2008.

There are now over 90 classrooms, several specialist rooms, special needs facilities and a large gymnasium.

[citation needed] After several years of fundraising, an oratory was built in 2004.

[6] With seating for over 200 people, school masses, memorial services, parent meetings are held in the oratory.

[5] GCS participates in a number of sports, including Gaelic games,[7] soccer, rugby and athletics.