Angustine J. (Gus) Coupe, 66, a teacher at Georgetown Preparatory School in Rockville for 37 years, died Monday at Suburban Hospital in Bethesda following a heart attack.

In 1940, Mr. Coupe began teaching the seventh and eight grades at Georgetown Prep. primarily in science, and during the war years, also aeronautics.

He served as athletic director at the school from 1962 until 1969. He coached teams for golf, football, basketball and track. He retired in 1977.

Mr. Coupe was born in England. He came to the United States when he was about a year old, and grew up in Rhode Island.

He directed the Georgetown Prep day camp and invitational basketball tournaments sponsored by the knights of Columbus.

He also officiated at high school basketball games here for many years and was a member of the D.C. Approved Basketball Officials Association.

Mr. Coupe was a fourth-degree member of the Knights of Columbus and active in the Holy Name Society at Our Lady of Lourdes Catholic Church, where he was a member for 30 years.

Survivors include his wife, Eileen Sullivan Coupe, and a son, Thomas A., of the home in Chevy Chase; a daughter, Elly Frieder, of Olney; six sisters, Sister Mary Eucharista, of Maryhood, N.Y., Sister Marie Estelle, of Nicaragua, Sister Ann Miriam, of Oahu, Hawaii, Sister Mary Magdalen, of Cumberland, R.I., Sister Mary Olive, of Attleborn, Mass., and Theresa Brindley, of Hollywood, Fla.; two brothers, the Rev. Austin E. Coupe, of Englewood, N.J., and Jerard Coupe, of Warren, R.I., and one grandchild.