1860 United States Federal Census
Name: G B Jackson
Age in 1860: 37
Birth Year: abt 1823
Birthplace: Virginia
Home in 1860: Northern Division, Tippah, Mississippi
Gender: Male
Post Office: Saulsbury
Household Members: Name Age
G B Jackson 37 Farmer b. VA abt 1823
Mary Jackson 20 wife b. VA abt 1840
Maggie Jackson 5 daughter b. MS abt 1855
Wm H Jackson 3 son b. MS abt 1857
Geo Jackson 1 son b. MS abt 1859

1870 United States Federal Census
about G B Jackson
Name: G B Jackson
Estimated Birth Year: abt 1824
Age in 1870: 46
Birthplace: Virginia
Home in 1870: Township 1 Range 1, Tippah, Mississippi
Race: White
Gender: Male
Value of real estate: View Image
Post Office: Salem
Household Members: Name Age
G B Jackson 46 Farmer b. VA abt 1824
M G Jackson 30 wife keeping house b. VA abt 1840
M L Jackson 14 daughter b. MS abt 1856
W H Jackson 13 son b. MS abt 1857
Geo R Jackson 11 son b. MS abt 1859
Lucius E Jackson 9 son b. MS abt 1861
Ida Jackson 5 daughter b. VA abt 1865
Walter W Jackson 3 son b. MS abt 1867
Jackson 5/12 daughter b. MS Dec 1869

As far as Confederate service is concerned, I only find two George B. Jackson's -- one in Jesse's Battalion, Kentucky Mounted Riflemen and one in the 5th Battalion, Virginia Infantry.

JR