The statute involved is OCGA § 19-7-3 (c), which states:
[T]he court may grant any grandparent of the child reasonable visitation rights if the court finds the health or welfare of the child would be harmed unless such visitation is granted, and if the best interests of the child would be served by such visitation. The court shall make specific written findings of fact in support of its ruling. There shall be no presumption in favor of visitation by any grandparent.
However, if a grandchild's parent is deceased, incapacitated or incarcerated OCGA § 19-7-3 (d) is applicable; no showing of harm without visitation is necessary, only a showing that visitation would be in the best interests of the children.