O.C.G.A. § 10-9-56

The revenue bonds authorized by this article are made securities in which all public officers and bodies of this state and all municipalities and all political subdivisions of this state; all insurance companies and associations and other persons carrying on an insurance business; all banks, bankers, trust companies, savings banks, and savings associations, including savings and loan associations, building and loan associations, investment companies, financial institutions, and other persons carrying on a banking business; all administrators, guardians, executors, trustees, and other fiduciaries; and all other persons who are authorized to invest in bonds or other obligations of the state may properly and legally invest funds including capital in their control or belonging to them. The revenue bonds are also made securities which may be deposited with and shall be received by all public officers and bodies of this state and all municipalities and political subdivisions of this state for any purpose for which the deposit of the bonds or other obligations of this state may be authorized.