Gray enlisted in
the Royal Artillery in 1950. He was commissioned into the
East Yorkshire Regiment in 1952 and served in
Malaya for two years during the
Malayan Emergency. He transferred to the
Parachute Regiment in 1955 and served in
Cyprus,
Suez Canal Zone,
Jordan,
Greece,
Bahrain,
Aden and
Northern Ireland. Gray commanded the
1st Battalion, Parachute Regiment from 1969 to 1971. He was appointed an
Officer of the Order of the British Empire in 1970. He was Chief of Staff of 1st Armoured Division,
British Army of the Rhine (BAOR) from 1973 to 1975 before attending the
Royal College of Defence Studies in 1976. He was the last commander of the
16th Parachute Brigade in 1977. Gray was Head of British Army Staff and Military Attache in Washington, D.C. and Military Advisor to the
Governor of Bermuda from 1979 to 1981. He was
General Officer Commanding (GOC)
South West District, which included command of the United Kingdom Mobile Force, from 1981 to 1984. He was Chief of Staff, BAOR at Rheindahlen from 1984 to 1985. Gray was promoted to
lieutenant general in 1985 and was GOC
South East District and Commander of Joint Forces HQ at Aldershot. He was appointed a
Knight Commander of the Order of the Bath in 1986, and retired from the army in 1988. Gray was Honorary Colonel of 10th Parachute Battalion from 1984 to 1988 and Deputy Colonel Commandant of the Parachute Regiment from 1986 to 1990. He was
Colonel Commandant of the Parachute Regiment from 1990 to 1993. ==Later life==