George Grant Gatley (September 10, 1868 – January 8, 1931) was a career officer in the United States Army.

[1][3] Gatley served in Cuba from 1906 to 1913, first as part of the U.S. occupation force, and later as an artillery trainer and instructor for the Cuban Army; he was promoted to major in 1911.

[1][3] He was with the 13th Field Artillery on the Mexican border during the Pancho Villa Expedition; from 1915 to 1917 he was a member of the Army's Ordnance Board, which designed and tested new cannons, and made recommendations about which ones to procure.

[3] In August 1917, Gatley was promoted to brigadier general as commander of the 55th Field Artillery Brigade, a unit of the 30th Division.

[5] Gatley commanded the 8th Field Artillery Brigade at Fort Knox, Kentucky from 1919 to 1920, and graduated from the Army War College in 1921.

[7] They were the parents of two daughters: Edith (1898–1985), the wife of Robert T. Nash and John Donald MacKenzie; and Dorothy (1902–1981), an actress whose stage name was Ann Harding.