In 1980 Lamar University Regents recognized Gray's meritorious service, awarding him an honorary doctorate of law.
He worked to promote the development of refineries and petrochemical plants, ports and waterways, downtown business, hospitals, charities, and Lamar University.
At South Park Junior College he coached football and taught mathematics, economics, and government.
[6] In 1972 Gray retired from First Security National Bank choosing to return to the president's office at Lamar University.
[7] During Gray's second term the university celebrated various improvements such as increases in enrollment and scholarships, creation of new bachelor's and master's degree programs, construction of the Mary and John Gray Library, dedication of the Speech and Hearing Center, and the opening of the Mamie McFaddin-Ward Health Science building.
Gray became director of the Brown Center of Lamar University and accepted an appointment by Governor William Clements to a Special Committee on Higher Education Financing.