This is the info I have obtained from my great uncle, James Allen McNabb:

George McNabb: born 1825, Sligo Ireland
Moved to Michigan in 1874
Died September 22, 1892

Charlotte Elizabeth Tompkins: born 1834
Died: 1906

Parents of George McNabb:
Thomas McNabb: born 1801, Sligo Ireland
Died: September 8, 1859, Ontario Canada

Jane: born in Ireland, died in Ontario Canada

I didn't have any of George's children listed, but I do have a list of his siblings (I am a descendent of his brother, James). There's quite a few dates and things, but let me know if you'd like them all.