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) No. 35.300.147.952

Publicly-held Company

EXTRAORDINARY SHAREHOLDERS’ MEETING
CALL NOTICE

Shareholders of GAFISA S.A. (“Company”) are summoned to hold an Extraordinary Shareholders’ Meeting (“Meeting”), to be held, in first call, on September 25, 2018, at 10:30 a.m., at the Company’s headquarters in the City and State of São Paulo, at Avenida das Nações Unidas, 8.501, 19º andar, in compliance with request submitted by the Company’s shareholders, to resolve on the following agenda:

(i) Remove from office all members of the Board of Directors;

(ii) Define the number of members to compose the Board of Directors; and

(iii) Elect the new member to compose the Board of Directors.

General Information:

̶              Since the Company has received from shareholders holding more than 5% of the its share capital, the multiple vote process will be adopted in compliance with provisions of CVM Instruction No. 165/91.

̶              The documentation referring to the matters on the agenda and other documents provided for in CVM Instruction No. 481/09 are available to shareholders at the Company’s headquarters, on its Investor Relations website (www.gafisa.com.br/ri/), and on the websites of B3 (www.b3.com.br) and Brazilian Securities and Exchange Commission (www.cvm.gov.br).

̶              Shareholder or his/her legal representative shall attend the Meeting bearing a document proving his/her identity, and where applicable, his/her powers of representation.

̶              Shareholders participating in the Fungible Custody of Registered Shares at B3 who intend to attend the Meeting shall present an updated statement of their shareholding position provided by custody institution within 48 horas prior to the Meeting.

̶              We request that proxies with special powers for representation at the Meeting shall be deposited at the Company’s headquarters, at the Investor Relations Department, until September 23, 2018.

̶              The Company will adopt the remote voting system pursuant to CVM Instruction No. 481/09, allowing its shareholders to send their remote voting forms (i) to the Company’s bookkeeping agent; (ii) by means of their respective custody agents; or (iii) directly to the Company, as per instruction mentioned in the remote voting form and in item 12.2 of the Company’s Reference Form.

São Paulo, August 14, 2018.

Odair Garcia Senra
Chairman of the Board of Directors.