The main building was designed in 1929 by Francis Jones and Percy Worthington. In keeping with the style of Oxbridge, it features a quadrangle and a grandiose Memorial Hall. Entrance to the quad is by a tripartite arch under a clock tower cupola. There is also the Paton Library (named after J.L. Paton, a former High Master), MGS Archive Room (formerly the Alan Garner Junior Library, which has since become part of the Paton Library), Common Room, Refectory, Medical Centre, Book Shop, Gymnasium and Swimming Pool. This is in addition to classrooms (subjects taught in this building are Art and Design, Mathematics, Economics, Classical Civilisation, Computing, Greek, History, Latin, Religion and Philosophy) and administrative offices.