Gordon Graydon Memorial Secondary School
 Gordon Graydon Memorial Secondary School Gordon Graydon GGMSS or simply Graydon for short is a Canadian high school serving Grades 9 to 12 located at 1490 Odgen Avenue in Mississauga Ontario Canada. Gordon Graydon is best known for housing the IBT Program and currently stands as one of the top ranking public schools in the Peel board.[citation needed]. The school opened in 1957 and celebrated its 50th anniversary on May 26 2007.