Gunning attended the
University of Toronto, and there he earned three degrees in physical chemistry; a BA Honors, an MA, and a PhD. He finished his schooling in 1942, when he earned his PhD. Next, he did post-doctoral studies at Harvard. After that, Gunning returned to Canada and became a research chemist in
Dr. Edgar Steacie's laboratory in Ottawa. He also did research for the National Research council at the time. In 1946, he became a professor at the University of Rochester and then at the
Illinois Institute of Technology. In 1957, he returned to Canada again and became Professor and Chair of the Department of Chemistry at the
University of Alberta. He was very passionate about building up the department to much higher standards. In the next ten years, Gunning's work achieved the University's chemistry department international recognition and it became a rapidly evolving center for chemical studies. In 1973, a new wing was added to the Chemistry building to accommodate for the rapid growth of the department, under Gunning's supervision. == Achievements/awards ==