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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported) October 7, 2005

                                  GenCorp Inc.
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             (Exact name of registrant as specified in its charter)

            Ohio                          1-01520                 34-0244000
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(State or other jurisdiction           (Commission            (I.R.S. Employer
     of incorporation)                 File Number)          Identification No.)

  Highway 50 and Aerojet Road, Rancho Cordova, California           95670
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         (Address of principal executive offices)                 (Zip Code)

Registrant's telephone number, including area code

                                  916-355-4000
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         (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[ ]  Written communications pursuant to Rule 425 under the Securities
     Act (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange
     Act (17 CFR  240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

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ITEM 2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION

Attached hereto as Exhibit 99.1 and incorporated herein by reference is the text
of the registrant's press release issued on October 7, 2005 in which GenCorp
Inc. reported financial results for the third quarter ended August 31, 2005.

As discussed in Exhibit 99.1, the press release contains forward-looking
statements within the meaning of the federal securities laws. These statements
are present expectations, and are subject to the limitations listed therein and
in GenCorp's other SEC reports, including that actual events or results may
differ materially from those in the forward-looking statements.

The foregoing information (including Exhibit 99.1) is being furnished under
"Item 2.02. Results of Operations and Financial Condition" and "Item 7.01.
Regulation FD Disclosure." Such information (including Exhibit 99.1) shall not
be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of
1934, as amended, nor shall it be deemed incorporated by reference in any filing
under the Securities Act of 1933, as amended, except as shall be expressly set
forth by specific reference in such filing.

The filing of this Report and the furnishing of this information pursuant to
Items 2.02 and 7.01 (including Exhibit 99.1) do not mean that such information
is material or that disclosure of such information is required.

ITEM 7.01. REGULATION FD DISCLOSURE

See "Item 2.02. Results of Operations and Financial Condition" above.

ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS

(c)     Exhibits

Exhibit No.     Description
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    99.1        GenCorp Inc.'s press release dated October 7, 2005.



                                    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, hereunto duly authorized.

                                           GENCORP INC.

                                           By:    /s/ Mark A. Whitney
                                                  ------------------------------
                                           Name:  Mark A. Whitney
                                           Title: Vice President, Law;
                                                  Deputy General Counsel
                                                  and Assistant Secretary

Dated: October 7, 2005



                                  EXHIBIT INDEX

Exhibit Number    Description
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    99.1          GenCorp Inc.'s press release dated October 7, 2005.