John Christopher Gimlin, 17, of Arlington, was identified by Metro officials Thursday as the young man who died when he jumped into the path of a subway train Wednesday in the Rosslyn station.

A Virginia state medical examiner ruled his death a suicide.

Known as Christopher, he was a senior at Yorktown High School, where he had been on the tennis team and was an editor of an unofficial school newspaper. He was born in Santa Fe, N.M., and was brought to this area as an infant.

His father, Hoyt Gimlin, the editor of Editorial Research Reports in Washington, said his son had suffered from emotional problems and had undergone psychiatric treatment, but seemed on the way to recovery. He had planned to enter college next fall to study history and philosophy.

Other survivors include his mother, Joan, a lecturer in English at American University; a sister, Elise, who attends Georgetown University; a brother, Peter, of the home, and his grandfather, Edward Sherako, of Plainfield, N.J.

The family suggests that expressions of sympathy be in the form of contributions to the American Schizophrenic Association. 1114 First Ave., New York, or the Potomac Appalachian Trail Club land acquisition fund, 1781 N St. NW, Washington.