As filed with the Securities and Exchange Commission on September 27, 2005
                                                    1933 Act File No. 333-
                                                     1940 Act File No. 811-21745


                     U.S. SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM N-2

                             REGISTRATION STATEMENT
                     UNDER THE SECURITIES ACT OF 1933 [ ]
                       PRE-EFFECTIVE AMENDMENT NO.    [ ]
                      POST-EFFECTIVE AMENDMENT NO. 1  [X]

                                     AND/OR

                        REGISTRATION STATEMENT UNDER THE
                         INVESTMENT COMPANY ACT OF 1940
                                  AMENDMENT NO. 3     [X]
                        (CHECK APPROPRIATE BOX OR BOXES)

          EATON VANCE TAX-MANAGED GLOBAL BUY-WRITE OPPORTUNITIES FUND
               --------------------------------------------------
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)

     THE EATON VANCE BUILDING, 255 STATE STREET, BOSTON, MASSACHUSETTS 02109
     -----------------------------------------------------------------------
               (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (ZIP CODE)

        REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE (617) 482-8260
        -----------------------------------------------------------------

                                 ALAN R. DYNNER
     THE EATON VANCE BUILDING, 255 STATE STREET, BOSTON, MASSACHUSETTS 02109
     -----------------------------------------------------------------------
                     NAME AND ADDRESS (OF AGENT FOR SERVICE)

                          COPIES OF COMMUNICATIONS TO:

    MARK P. GOSHKO, ESQ.                            LEONARD B. MACKEY, JR., ESQ.
KIRKPATRICK & LOCKHART NICHOLSON GRAHAM LLP            CLIFFORD CHANCE US LLP
       75 STATE STREET                                  31 WEST 52ND STREET 
BOSTON, MASSACHUSETTS 02109                             NEW YORK, NY 10019
                                                    

      APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING: As soon as practicable after
the effective date of this Registration Statement.

      [X] This form is filed to register additional securities for an offering
          pursuant to Rule 462(b) under the Securities Act and the Securities
          Act registration statement for the same offering is 333-123961.

      If any of the securities being registered on this form are to be offered
on a delayed or continuous basis in reliance on Rule 415 under the Securities
Act of 1933, other than securities offered in connection with a dividend
reinvestment plan, check the following box. [ ]

      It is proposed that this filing will become effective (check appropriate
box): [ ] when declared effective pursuant to Section 8(c)

        CALCULATION OF REGISTRATION FEE UNDER THE SECURITIES ACT OF 1933



                                                              PROPOSED          PROPOSED
                                         AMOUNT BEING         MAXIMUM            MAXIMUM            AMOUNT OF
                                          REGISTERED          OFFERING          AGGREGATE       REGISTRATION FEES
TITLE OF SECURITIES BEING REGISTERED          (1)          PRICE PER UNIT    OFFERING PRICE          (1)(2)
                                                                (1)                (1)
                                                                                    
Common Shares of Beneficial                5,000,000         $20.00            $100,000,000          $11,770   
Interest, $0.01 par value


(1)   Estimated solely for purposes of calculating the registration fee,
      pursuant to Rule 457(o) under the Securities Act of 1933.

(2)   Includes Shares that may be offered to the Underwriters pursuant to an
      option to cover over-allotments.

                      ------------------------------------

      This Registration Statement is being filed by the Eaton Vance Tax-Managed
Global Buy-Write Opportunities Fund (the "Registrant") pursuant to Rule 462(b)
promulgated under the Securities Act of 1933, as amended. The Registrant hereby
incorporates by reference into this Registration Statement the content of the
Registrant's Registration Statement on Form N-2 and all amendments thereto (File
No. 333-123961) declared effective on September 27, 2005 by the Securities and
Exchange Commission (the "Commission") including each of the documents filed by
the Registrant with the Commission therein.




                                     NOTICE


     A copy of the Agreement and Declaration of Trust of Eaton Vance Tax-Managed
Global Buy-Write Opportunities Fund is on file with the Secretary of State of
the Commonwealth of Massachusetts and notice is hereby given that this
instrument is executed on behalf of the Registrant by an officer of the
Registrant as an officer and not individually and that the obligations of or
arising out of this instrument are not binding upon any of the Trustees,
officers or shareholders individually, but are binding only upon the assets and
property of the Registrant.



                                   SIGNATURES

      Pursuant to requirements of the Securities Act of 1933 and the Investment
Company Act of 1940, the Registrant has duly caused this Post-Effective
Amendment No. 1 to the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized in the City of Boston and the
Commonwealth of Massachusetts, on the 27th day of September 2005.

                     EATON VANCE TAX-MANAGED GLOBAL BUY-WRITE OPPORTUNITIES FUND


                                             By:   /s/ Duncan W. Richardson
                                                   --------------------------
                                                   Duncan W. Richardson
                                                   President and Chief Executive
                                                   Officer

      Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 1 to the Registration Statement has been signed by
the following persons in the capacities and on the dates indicated.



                    Signature                                        Title                               Date
                    ---------                                        -----                               ----
                                                                                             
/s/ Duncan W. Richardson                                 President and Chief                       September 27, 2005
--------------------------------------------             Executive Officer
Duncan W. Richardson

/s/ James L. O'Connor                                    Treasurer and Principal Financial         September 27, 2005
--------------------------------------------             and Accounting Officer
James L. O'Connor

/s/ James B. Hawkes                                      Trustee                                   September 27, 2005
--------------------------------------------
James B. Hawkes

Benjamin C. Esty*                                        Trustee                                   September 27, 2005
--------------------------------------------
Benjamin C. Esty

Samuel L. Hayes, III*                                    Trustee                                   September 27, 2005
--------------------------------------------
Samuel L. Hayes, III

William H. Park*                                         Trustee                                   September 27, 2005
--------------------------------------------
William H. Park

Ronald A. Pearlman*                                      Trustee                                   September 27, 2005
--------------------------------------------
Ronald A. Pearlman

Norton H. Reamer*                                        Trustee                                   September 27, 2005
--------------------------------------------
Norton H. Reamer

Lynn A. Stout*                                           Trustee                                   September 27, 2005
--------------------------------------------
Lynn A. Stout

Ralph F. Verni*                                          Trustee                                   September 27, 2005
--------------------------------------------
Ralph F. Verni      


* By: /s/ Alan R. Dynner
-------------------------------------
Alan R. Dynner (As attorney in-fact)