Indicate by check mark if the registrant is submitting
the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes ______ No ___X___

Indicate by check mark whether by furnishing the information contained in this Form,
the Registrant is also thereby furnishing the information to the Commission pursuant
to Rule 12g3-2(b) under the Securities Exchange Act of 1934:

Yes ______ No ___X___

If “Yes” is marked, indicate below the file number assigned
to the registrant in connection with Rule 12g3-2(b): N/A

GAFISA S.A.

Corporate Taxpayer’s ID (CNPJ/MF) No. 01.545.826/0001-07

Corporate Registry (NIRE) 35.300.147.952

Publicly-Held Company

NOTICE TO MARKET

GAFISA S.A. (BOVESPA: GFSA3; NYSE, GFA) (“Gafisa” or “Company”) hereby discloses to the market the communication received on this date from its shareholders (i) Wishbone Delaware Brazil I, LLC, enrolled with CNPJ/MF under No. 11.704.417/0001-51, and (ii) Wishbone Restricted Partners, LP, enrolled with CNPJ/MF under No. 11.925.127/0001-38, all with headquarters located at 155 North Wacker Drive, 46th floor, in the city of Chicago, Illinois, United States of America, and managed by Wishbone Management, LP (“Investor”), pursuant to Article 12 of CVM Instruction 358/02, as follows:

1. The Investor became the holder of 4,382,872 common shares issued by Gafisa, on August 23, 2018, being (i) 3,789,272 shares held by Wishbone Delaware Brazil I, LLC; and (ii) 593,600 shares held by Wishbone Restricted Partners, LP, reaching the total relevant participation of 9.79% of the total capital stock of the Company;

2. The Investor confirms that this is a minority investment vehicle, that the holding is for investment purposes only and there is no intention to change the Company’s control composition or its managerial structure;

3. In addition, the Investor declares that he does not hold any convertible debentures issued by the Company or any other securities convertible in shares or that grant rights to subscribe or acquire shares issued by the Company; and

4. Finally, the Investor declares that it has not entered into any contract or agreement governing the exercise of voting rights or the purchase and sale of the securities issued by the Company.

São Paulo, August 28, 2018.

GAFISA S.A.

Carlos Eduardo Moraes Calheiros

Chief Financial and Investor Relations Officer