I'm reading material in the book "Mississippi In Africa", by Alan Huffman, 2004, that claims that General Randall Lee Gibson's great grandfather 'Gideon Gibson (2)' was a mulatto according to a 1996 Public Broadcasting Service Frontline report, "Claiming Place: Bi-Racial American Portraits". I also found this website below that traces this ancestry.

http://tulanelink.com/tulanelink/gibson2_box.htm

Gideon Gibson (2) was the son of a free Black man 'Gideon Gibson (1) and a white woman, Mary Martha O'Connell, part of a group of mixed raced families that had settled in the back country of South Carolina in the early 1700s.

See...

http://tulanelink.com/tulanelink/gibson4_box.htm

General Gibson's war record...

"1861, he left the capital to join the 1st Louisiana Artillery. Later in the year, he was commissioned as colonel of the 13th Louisiana Infantry. Gibson fought at the Battle of Shiloh and subsequent actions. With the Army of Tennessee, he took part in the 1862 Kentucky Campaign and the Battle of Chickamauga. After being promoted to brigadier general on January 11, 1864, he fought in the Atlanta Campaign and the Franklin-Nashville Campaign; then was assigned to the defense of Mobile, Alabama. He inspired his troops to hold Spanish Fort, which was under siege, until the last moment, after which they escaped at night on March 8, 1865."

Very interesting fact.

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David Upton