Gilbert McCrea Eaton was born in Toronto, ON on June 13, 1915, grandson of Timothy Eaton founder of the T. Eaton Co. He received his early education at Crescent School in Toronto followed by courses of study in England and Europe.

He commenced his business career with the T. Eaton Co. in 1935 and retired in 1963 after 28 years with the family Company having held several management positions, including Director the T. Eaton Co.; the T. Eaton Co. Maritimes Ltd.; the T. Eaton Co. of Montreal; the T. Eaton Co. Western Ltd.; the Canadian Department Stores Ltd.; the T. Eaton Realty Co. Ltd.; the T. Eaton Co. Saskatchewan Ltd.; Director the T. Eaton Life Assurance Co.

He became Chairman of the Manitoba Committee in 1942 and held the position until 1948. He was also National Director of the Air Cadet League of Canada; he received the MBE in recognition of his work with the Air Cadet Program. He was also founding Commodore of the Manitoba Yacht Club, past member of the Manitoba Club, St. Charles Country Club, Winnipeg Winter Club and the R.C.Y.C. Toronto.

He was a generous supporter of the Air Cadet program until his death, both financially and in the use of his private aircraft in transporting members on squadron visits. He died in Miami, Florida on Wednesday February 13, 1985 at age 69.