The Association's aim is to foster communication between the School and the parents/guardians and to advise, inform and make recommendations as regards matters related to the School and its students.

Membership is open to all parents and guardians, and there is an annual subscription fee, paid upon registration. The Annual General Meeting is held in October, and the Committee is elected every year. The work and role of the Association are set out in detail in its Constitution.

The parents and Guardians Association organises an Annual Dinner-Dance for all parents and friends of the GCS, in March, and another one in June in honour of the graduating class and their parents.