GBS introduced Cambridge University O-Levels in 1990 GCE A Level commenced in 2010. students are selected on the basis of the results of Entrance Examinations which take place in June. The maximum number of enrolled AS students aged 16 to 17 has been 28 so far and the intake for the academic year 2017/18 is 24. All students are offered the following subjects: AS: General Paper, Physics, Chemistry, Math, Biology/Computer A2: Physics, Chemistry, Biology/Computer, Math