N.M. Stat. § 40-9-1.1
Definitions.
As used in the Grandparent's Visitation Privileges Act, "grandparent" means:
A. the biological grandparent or great-grandparent of a minor child; or
B. a person who becomes a grandparent or great-grandparent due to the adoption
of a minor child by a member of that person's family.