He was born circa 1766. His father was Gaspar Garcia, and his mother was Maria Gertrudis de la Barrera. His father owned Mier 1 grant.
He married Rosalia de la Garza, daughter of Francisco de la Garza Villarreal and Maria Rita Hinojosa. Her father owned Camargo 71 grant.
Francisca Garcia. She married Rafael de la Garza, son of Jose Antonio de la Garza and Maria Guadalupe Perez. She married Antonio Gonzalez.
In 1782, he lived in Mier in household number 17. The church census recorded that he was a youth, español, and 16 years old. His household included 7 people:
Don Gaspar Garcia, married, español, age 52.
Doña Maria Guadalupe Flores, married, española, age 42.
Jose Antonio Garcia, single, español, age 26.
Jose Carlos Garcia, a youth, español, age 16.
Jose Tomas Garcia, a child, español, age 13.
Maria Francisca Garcia, a child, española, age 10.
Maria Ana Garcia, an unmarried girl, india, age 23.