Ga. Code § 50-10-6
It is found, determined, and declared that the creation of this authority and the carrying out of its corporate purposes are in all respects for the benefit of the people of the state and that the authority is an institution of purely public charity and will be performing an essential governmental function in the exercise of the power conferred upon it by this chapter. For such reasons the state covenants with the holders from time to time of the bonds, notes, and other obligations issued under this chapter that the authority shall not be required to pay any taxes or assessments imposed by the state or any of its counties, municipal corporations, political subdivisions, or taxing districts upon any property acquired by the authority or under its jurisdiction, control, possession, or supervision or leased by it to others, or upon its activities in the operation or maintenance of any such property or on any income derived by the authority in the form of fees, recording fees, rentals, charges, purchase price, installments, or otherwise, and that the bonds, notes, and other obligations of the authority, their transfer, and the income therefrom shall at all times be exempt from taxation within the state. The tax exemption provided in this chapter shall not include any exemption from sales and use tax on property purchased by the authority or for use by the authority.
OCGA § 50-10-6