Gibbs was married three times. His first marriage was on July 24, 1926 to Helen Marguerite Galpin, the daughter of William Galpin (an English butler who worked for Mortimer Schiff). His second wife was Elizabeth Ada Crawford, whom he married in August 1929, a Detroit native who worked as a writer in "The New Yorker"'s promotion department. Less than a year after their marriage, Elizabeth committed suicide by plunging to her death from the window of their apartment on the seventeenth floor of 45 Prospect Place in Tudor City, New York on March 31, 1930.