U.S. Marine Corps Gunner Gilbert H. Bolton was born in Portsmouth, Ohio and enlisted in the Marine Corps in 1959. He served as an infantry Marine and officer until he retired in 1991 at the age of 50. During his time in the Marine Corps, Bolton rose through the ranks from private to an infantry weapons officer, also known as a Marine Gunner. A Marine Corps Gunner is a technical expert of all Marine Corps weapons systems, and their employment. - U.S. Marine Corps Gunner Gilbert H. Bolton was born in Portsmouth, Ohio and enlisted in the Marine Corps in 1959. He served as an infantry Marine and officer until he retired in 1991 at the age of 50. During his time in the Marine Corps, Bolton rose through the ranks from private to an infantry weapons officer, also known as a Marine Gunner. A Marine Corps Gunner is a technical expert of all Marine Corps weapons systems, and their employment.