When Garret G. Gunter was born on 6 March 1853, in Mercer, Missouri, United States, his father, Thomas Gunter, was 44 and his mother, Nancy Yates, was 39. He married Frances Miller in 1874. They were the parents of at least 7 sons and 2 daughters. He lived in Garfield, Nebraska, United States in 1920 and Arnold, Custer, Nebraska, United States in 1930. He died on 20 November 1939, in Fresno, California, United States, at the age of 86, and was buried in Arnold, Custer, Nebraska, United States.