When Gertrude Elizabeth Tewksbury was born on 29 July 1892, in Virgil, Kane, Illinois, United States, her father, Clarence Edward Tewksbury, was 24 and her mother, Maggie Butcher, was 18. She married Milford Valentine Gibbs on 10 December 1907, in Kane, Illinois, United States. She lived in Milner, Routt, Colorado, United States in 1930 and McGregor, Routt, Colorado, United States in 1940. She died on 29 March 1971, in Steamboat Springs, Routt, Colorado, United States, at the age of 78, and was buried in Hayden, Routt, Colorado, United States.