He was born circa 1774. His father was Felix Gomez de Castro, and his mother was Maria Gertrudis Gonzalez.
He married Maria Gertrudis Hinojosa, daughter of Manuel Hinojosa [Jr.] and Juana Sanchez on 25 Jun 1799 in Mier. He was 25 years old, and the bride was 18 years old. Her father owned Mier 5 grant.