Did a little checking this morning and thought I would send along for your review:
1. I saw the Pension App you mentioned here. Dixie Dellinger is a member of our Gibbs DNA Group, a wonderful resercher ,but currently unable to do any because caring for a husband paralized by a stroke.
2.I found a John Gibbs in Greenup in 1820 census:
1 m, 16 to 25
1 f, 16 to 25
A young couple and most likely a son of James.
I also found that this John had a dau.Amanda who married a McGarlin and died 10 July 1853 at the age of 25. Mother not listed. Early Death Records of Ky.
3. From the Pension App on James I learned that he was born in Lancaster Va. Lived for awhile in Culpepper Co.,Va. Came to Ky in 1802. Lived 6 years in Mason Co.,Ky; 6 or 7 years in lewis Co.,Ky on the Ohio River and the remainder of his time in Greenup
4. 1830 Census of Greenup County Ky.
James 1 m 10-14, 1 male 80-89 ,1 f 30 to 39 and 1 f 60 to69 and 5 slaves.
John: 1 m, 30-39; 1 f un 5; 1 f, 5 to 9; 1 f 30 to 39 and 1 f 40 to 49 (lastly prob. a sister?
You may have all of this, but evry little tid bit helps.
I could not find James in the 1840 census ,Ancestry.com records. But he had to be there unless living with someone else - a married dau. perhaps??