Youo probably have this, I was unable to find parents for George W.
George Washington Horton and Louisa Day had a son
George Nelson Horton, born 16 Aug 1859 died 20 Jan 1948 in Nashville, Tenn
His spouse was Hanna Long Horton..
Tennessee, Death Records, 1914-1955," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/NSR7-YBQ : accessed 06 Oct 2012), George Nelson Horton, 1948.