When Gilbert Roy Caldwell was born on 13 August 1892, in Lorance Township, Bollinger, Missouri, United States, his father, Joseph F Caldwell, was 40 and his mother, Martha A. Crader, was 38. He married Alma Edna Love on 2 November 1926, in Valliant, McCurtain, Oklahoma, United States. They were the parents of at least 1 daughter. He died on 11 May 1963, in Wilson Township, McCurtain, Oklahoma, United States, at the age of 70, and was buried in Valliant Cemetery, Valliant, McCurtain, Oklahoma, United States.