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

São Paulo, SP, Brazil, September 22, 2016 – Pursuant to Article 12 of CVM Instruction No. 358/02, Gafisa S.A. (BOVESPA: GFSA3) (“Gafisa” or “Company”), hereby discloses to the market communication received on this date, from its shareholder FUNCEF – Fundação dos Economiários Federais, with headquarters located in the city of Brasília, Distrito Federal, at Setor Comercial Norte, Quadra 02, Bloco A – 13º andar, CEP 70712-900, enrolled with CNPJ/MF under No. 00.436.923/0007-90 (defined as “Investor”), declaring that, on September 13, 2016, it holds, direct and indirectly, the rights over 17,348,789 common shares of Gafisa, equivalent to 4.59% of Company’s total capital stock.

This new amount of shares no longer qualifies the Investor as holding a significant stake in the Company’s total capital stock, under the terms of Article 12 of CVM Instruction No. 358/02.

GAFISA S.A.

André Bergstein

Investor Relations Officer