Could I just point out that our OP is in Karachi.
GCSEs and A-leves are British exams, I'm pretty certain that they mean absolutely nothing to him. I'm sure there are perfectly good school exams in Pakistan, but they'll be different to the British version.
500 Schools in Pakistan sit the Cambridge I-GCSE exams:
New Country Director for Pakistan
Remember, that when the State run GCSE syllabus was introduced the old 'O' & 'A' level boards died off. But Cambridge exams survived and were successfully marketed across the world. Furthermore, the academic standards were maintained.
Of course, back in Blighty, we were slow to notice that . . .