Exhibit 99.1

GEORGIA-CAROLINA BANCSHARES ANNOUNCES

NET INCOME FOR THIRD QUARTER 2014

October 22, 2014

Augusta, Georgia

Georgia-Carolina Bancshares, Inc. (GECR.OB) (the “Company”), parent company of First Bank of Georgia, today announced 2014 third quarter net income of $1,396,000, or $0.38 per diluted common share, for the three months ended September 30, 2014, compared to $843,000, or $0.23 per diluted common share, for the three months ended September 30, 2013. For the year to date period ending September 30, 2014, net income was $3,211,000, or $0.88 per diluted common share, compared to $5,269,000, or $1.47 per diluted common share, for the same period in 2013. During the second quarter of 2014, the Company announced a pending merger with State Bank Financial Corporation, which is anticipated to close in early 2015. Merger related expenses of $794,000 have been incurred for the nine months ended September 30, 2014. Net income excluding the merger expenses was $3,889,000, or $1.07 per diluted earnings per common share for the first nine months of 2014.

Remer Y. Brinson III, President & CEO of the Company, stated “We are pleased to report strong earnings for the first nine months of 2014 and continue to see a return to a more stable economic environment. We have enjoyed strong loan demand over the past four quarters and solid growth in core deposits. However, mortgage originations during the first nine months of 2014 have continued to lag behind originations during the same period last year.”

“The year to date earnings of $3,889,000, excluding merger related expenses, represent a 1.01% return on assets,” Brinson continued.

Georgia-Carolina Bancshares’ Board of Directors declared a quarterly cash dividend of $0.045 per share of common stock payable on November 11, 2014, to shareholders of record as of November 4, 2014.

Georgia-Carolina Bancshares’ common stock is quoted on the OTC Marketplace (OTCQB) under the symbol “GECR”. First Bank of Georgia conducts banking operations through offices in Richmond County (Augusta), Columbia County (Evans and Martinez), and McDuffie County (Thomson), Georgia and operates mortgage origination offices in Augusta and Savannah, Georgia.

This press release may contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, which can generally be identified by the use of forward-looking terminology such as “believes,” “expects,” “may,” “will,” “should,” “anticipates,” “plans” or similar expressions to identify forward-looking statements, and are made on the basis of management’s plans and current analyses of the Company, its business and the industry as a whole. These forward-looking statements are subject to risks and uncertainties, including, but not limited to, economic and market conditions, competition, interest rate sensitivity and exposure to regulatory and legislative changes, and other risks and uncertainties described in the Company’s periodic filings with the Securities and Exchange Commission.

Although we believe that the assumptions underlying the forward-looking statements are reasonable, any of the assumptions could prove to be inaccurate. Therefore, we can give no assurance that the results contemplated in the forward-looking statements will be realized. The inclusion of this forward-looking information should not be construed as a representation by the Company or any person that the future events, plans, or expectations contemplated by the Company will be achieved. The Company undertakes no obligation to update publicly or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.

Additional Information About the Merger and Where to Find It

In connection with the proposed merger transaction, State Bank Financial Corporation (“State Bank”) has filed a registration statement on Form S-4 with the Securities and Exchange Commission (the “SEC”) to register State Bank’s shares that will be issued to the Company’s shareholders in connection with the transaction. The registration statement includes a preliminary proxy statement of the Company and a preliminary prospectus of State Bank, as well as other relevant documents concerning the proposed transaction. The registration statement and the proxy statement/prospectus related to the proposed transaction contain important information about the Company, State Bank and the proposed transaction and related matters. WE URGE SECURITY HOLDERS TO READ THESE MATERIALS WHEN THEY BECOME AVAILABLE (AND ANY OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE TRANSACTION OR INCORPORATED BY REFERENCE INTO THE REGISTRATION STATEMENT AND PROXY STATEMENT/PROSPECTUS) BECAUSE THOSE DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION. Security holders may obtain free copies of these documents and other documents filed with the SEC on the SEC’s website at http://www.sec.gov. Security holders may obtain free copies of the documents filed with the SEC by the Company at its website at https://www.firstbankofga.com (which website is not incorporated herein by reference) or by contacting Thomas J. Flournoy by telephone at 706-731-6622. Security holders may also obtain free copies of the documents filed with the SEC by State Bank at its website at http://www.statebt.com (which website is not incorporated herein by reference) or by contacting Jeremy Lucas by telephone at 404-239-8626.

Participants in this Transaction

The Company, State Bank and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the shareholders of the Company in connection with the proposed merger. Information regarding these persons who may, under the rules of the SEC, be considered participants in the solicitation of shareholders in connection with the proposed Merger will be provided in the proxy statement/prospectus described above. Additional information regarding each of the Company’s and State Bank’s respective directors and executive officers, including shareholdings, is included in the Company’s definitive proxy statement for 2014, which was filed with the SEC on April 14, 2014, and State Bank’s definitive proxy statement for 2014, which was filed with the SEC on April 11, 2014. You can obtain free copies of this document from the Company or State Bank, respectively, using the contact information above.

GEORGIA-CAROLINA BANCSHARES, INC.

Consolidated Balance Sheets

(dollars in thousands, except share and per share data)

GEORGIA-CAROLINA BANCSHARES, INC.

Consolidated Statements of Income

(dollars in thousands, except per share amounts)