Three schools amalgamated in 1978 to form Adelaide Gymnasium whose pupils are nicknamed Kwaggas - the Adelaide Hoërskool, Hoër Huishoudskool (for girls only) and the Piet Retief Hoër Tegniese Skool (boys only). The school was
then called Hoërskool Piet Retief. In 1993 the name was changed to Adelaide Gymnasium, which was the original choice of name for the school.