Ga. Code § 36-82-85
The powers conferred by this article shall be in addition and supplemental to, and not in substitution for, the powers conferred by any other general, special, or local law. The limitations imposed by this article shall not affect the powers conferred by any other general, special, or local law. Bonds may be issued under this article without regard to any other general, special, or local law. The General Assembly declares its intention that the limitations of the amount or percentage of, and the restrictions relating to, indebtedness of a governmental body and the incurring thereof contained in the Constitution of this state and in any general, special, or local law shall not apply to bonds and the issuance thereof under this article.
OCGA § 36-82-85