The Adventure The Manchester Grammar School is the largest independent day school for boys aged 9 to 18 in the United Kingdom. Situated in south Manchester it serves Greater Manchester, Cheshire and Lancashire. MGS junior school is for boys aged 9 to 10. MGS senior and sixth form boys are aged 11 to 18. The school has a world wide reputation for academic excellence as does its terrific programme of over 128 extra curricular activities. Mgs.org~Site InfoWhoisTrace RouteRBL Check