
Quoting
OCGA Sec. 19-12-1(c)
(c) If the petition seeks to change the name of a minor child, the written consent of his parent or parents if they are living and have not abandoned the child, or the written consent of the child's guardian if both parents are dead or have abandoned the child, shall be filed with the petition, except that the written consent of a parent shall not be required if the parent has not contributed to the support of the child for a continuous period of five years or more immediately preceding the filing of the petition.