> Just found my copy of Gabriel's will. Do you have it?
The Fayett Co. Will Book No. 1, pp. 234 - 235, lists the will of Gabrial Abrams. It mentions his wife Elizabeth, son Henry, granddaughter Eliza Seckman, son Eli, son David, and son John. The will is dated 17 July 1835. This is readily available on microfilm anywhere in the USA via the LDS FamilyHistory library system.
This will mentions a wife Elizabeth who is clearly at least a second wife, as per his letter within the Revolutionary War pension record, available on microfilm at any major genealogical library.
Late in life Gabriel Abrams and new wife Elizabeth were living with son David Abrams and step-daughter Nancy (nee McClelland) (my ggg grandparents) in Fayette Co. PA near Uniontown. Gabriel Abrams seems to have been working as a tavern keeper at that time. You can find many records on Gabriel Abrams via a keyword search in the Historical Pittsburgh library system, mostly due to his Revolutionary War service (at Fort Pitt, etc.)