Ga. Code § 45-7-50
The disbursing or fiscal officer of any state department, board, bureau, commission, agency, municipality, county, or other political subdivision thereof may deduct from the salary of any employee of this state, county, municipality, or political subdivision thereof such amount as the employee shall authorize in writing for the purchase of United States savings bonds for the employee. The written authorization shall be filed with the disbursing or fiscal officer of such state department, board, bureau, commission, agency, municipality, or county, and he shall make such rules and regulations governing the purchase of the bonds as he may deem necessary, which rules and regulations shall be incorporated in the employee's written authorization. The authorization of the employee may be withdrawn by the employee at any time upon filing written notice of withdrawal with said disbursing or fiscal officer.
OCGA § 45-7-50