Gafisa : Report of Foreign Issuer

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For the month of November, 2018

(Commission File No. 001-33356),

Gafisa S.A.

(Translation of Registrant's name into English)

Av. Nações Unidas No. 8501, 19th floor

São Paulo, SP, 05425- 070

Federative Republic of Brazil (Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ___X___ Form 40-F ______

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1)

Yes ______ No ___X___

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.

CNPJ/MF n ° 01.545.826/0001-07

NIRE 35.300.147.952

Publicly-held Company

NOTICE TO THE MARKET

São Paulo, SP, Brazil, November 12, 2018 - GAFISA S.A. (BOVESPA: GFSA3) (" Gafisa " or " Company "), makes available to the market the following notice received on this date:

"The Grupo GWI, of which GWI Asset Management S.A., a corporation headquartered in the City and State of São Paulo at Av. Brigadeiro Faria Lima, nº 3900, 6º andar, conj. 602, is a part of, pursuant to CVM Instruction No. 358/2002, amended by CVM Instruction No. 449/07, hereby informs that became holder of the total amount of nineteen million, eight thousand, one hundred and ninety-six (19,008,196) common shares, corresponding to 42.47% of the Company's common shares.

The Fund points out that this share acquisition has the sole purpose of investment, also informs that (i) it neither holds warrants nor debentures convertible into shares issued by the Company; and (ii) it has not executed any agreement or contract regulating the exercise of voting right or the purchase and sale of securities issued by the Company.

There being no further matter to discuss, we remain at your disposal for any clarification."

GAFISA S.A.

Ana Maria Loureiro Recart

Chief Executive, Financial and Investor Relations Officer

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: November 13, 2018

Gafisa S.A.

By:

/s/ Ana Maria Loureiro RecartName: Ana Maria Loureiro RecartTitle:Chief Executive Officer