Morgan L. Gies, 72, a Secret Service agent who was in charge of the White House vehicles before his retirement in 1967, died of cancer May 13 at his home in Reisterstown, Md. He also had a residence in Hyattsville.

Mr. Gies was born in Reistertown and grew up there. As a young man, he was an assistant purser in the Merchant Marine. He managed a service station in Baltimore before joining the Secret Service in 1940.

He was assigned to the White House detail and was a driver for Presidents Roosevelt and Truman. He later was put in charge of the vehicles used by the presidents. He contributed to the design of "bubble top" limousines and other vehicles used to give extra protection to presidents.

After retiring from the Secret Service, he was the owner and manager of a service station that had been started by his family in Reistertown. Until about six months ago, when he moved to Reistertown, he commuted there from Hyattsville. Mr. Gies spent much of his spare time on a boat he kept near Annapolis. He was a member of the Association of Former Agents of the U.S. Secret Service.

Survivors include his wife, Hazel Keeney Gies of Reisterstown and Hyattsville; two sons, Edward, of Brentwood, and Douglas, of Reisterstown; a sister, Margaret Ellen Gies of Sun City, Fla., and three grandchildren. a

The family suggests that expressions of sympathy be in the form of contributions to the Foundation of the Associaton of Former Agents to the U.S. Secret Service Inc., P.O. Box 31073, Washington, D.C., 20031.