(a) A tribunal of this state may serve as an initiating or responding tribunal in a proceeding brought under this article or a law substantially similar to this article, or the Uniform Reciprocal Enforcement of Support Act, or the Revised Uniform Reciprocal Enforcement of Support Act to determine that the petitioner is a parent of a particular child or to determine that a respondent is a parent of that child.

(b) In a proceeding to determine parentage, a responding tribunal in Georgia shall apply the procedural and substantive law of this state and the rules of this state on choice of law.