GAHS has been recognized for a number of causes, including (but not limited to): the Canadian record of per capita student contributions in donations to the Canadian Cancer Society, championships in football, hockey, basketball, track & field, wrestling, tennis, cross country and volleyball; the recipient of several Essex County "Student Prime Minister of the Year" awards (2004, 2005, & 2009) and high rankings in the University of Waterloo Fermat Mathematics competition.

Girls Basketball team has broken numerous Ontario records, including the capture of 9 consecutive OFSAA medals (as of 2012) led by longtime coach Dom Silvaggio.

The team was defeated by St. Catharines St. Francis in the 2012 OFSAA championship game, missing out on back-to-back gold medals by 2 points.

[citation needed] The Senior Girls Volleyball team emerged as a provincial power over the last 15 years.

The structure upon which the student parliament and its constitution were organized has been used as a model for other area secondary schools in the region for over two decades.