GFASY Gafisa SA (PK)

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, January 19, 2018 - GAFISA S.A. (BOVESPA: GFSA3) (“ Gafisa ” ou “ Companhia ”) hereby informs the market that, as of January 22, 2018, the Subscription Rights exercised during the Initial Period of Preemptive Rights and in eventual extraordinary periods for subscription of unsubscribed shares, after converted into Subscription Receipts, represented by the symbol GFSA9, will be negotiated in spot market of B3 until its transformation into shares, which will take place after the capital increase homologation, if, at least, the minimum subscription is attained, in accordance with the Notice to Shareholders published on December 20, 2017.

GAFISA S.A.

Carlos Calheiros

Diretor Financeiro e de Relações com Investidores