When Gordon Augdon Thomason was born on 12 December 1892, in Texas, United States, his father, Charles Bauldon Thomason, was 39 and his mother, Emily Allen, was 33. He married Minnie Levora Munselle on 4 October 1916, in Brown, Texas, United States. They were the parents of at least 1 son and 1 daughter. He lived in Brown Land District, Texas, United States in 1935 and Justice Precinct 1, Brown, Texas, United States in 1940. He died on 4 January 1946, in Brownwood, Brown, Texas, United States, at the age of 53, and was buried in Greenleaf Cemetery, Brownwood, Brown, Texas, United States.