Guardians ad litem may be nominated by parties to the case, but it remains the responsibility of the court, in its discretion, to choose an appropriate party to serve as a guardian ad litem. A guardian ad litem must either be disinterested or have an interest identical or similar to the person for whom he is appointed, but may not have an interest which could possibly conflict with the person for whom he is appointed.
Ga. R. Prob. Ct. 5.4