SCHEDULE 13G

CUSIP No.

36831E108

1

Names of Reporting Persons

Michael Jay Sacks

2

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 142,565,831.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 142,565,831.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

142,565,831.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

11

Percent of class represented by amount in row (9)

72.8 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No.

36831E108

1

Names of Reporting Persons

Grosvenor Holdings, L.L.C.

2

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ILLINOIS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 134,858,026.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 134,858,026.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

134,858,026.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

11

Percent of class represented by amount in row (9)

71.7 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No.

36831E108

1

Names of Reporting Persons

Grosvenor Holdings II, L.L.C.

2

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,226,977.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,226,977.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,226,977.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

11

Percent of class represented by amount in row (9)

5.7 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No.

36831E108

1

Names of Reporting Persons

GCM Grosvenor Management, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,480,828.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,480,828.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,480,828.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

11

Percent of class represented by amount in row (9)

7.8 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No.

36831E108

1

Names of Reporting Persons

GCM Progress LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 90,155,396.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 90,155,396.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

90,155,396.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

11

Percent of class represented by amount in row (9)

62.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No.

36831E108

1

Names of Reporting Persons

GCM Progress Subsidiary LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 90,155,396.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 90,155,396.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

90,155,396.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

11

Percent of class represented by amount in row (9)

62.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.

(a)

Name of issuer:

GCM Grosvenor Inc.

(b)

Address of issuer's principal executive offices:

900 North Michigan Avenue, Suite 1100, Chicago, IL 60611.

Item 2.

(a)

Name of person filing:

Michael Jay Sacks Grosvenor Holdings, L.L.C. Grosvenor Holdings II, L.L.C. GCM Grosvenor Management, LLC GCM Progress LLC GCM Progress Subsidiary LLC

(b)

Address or principal business office or, if none, residence:

The principal business address of the Reporting Persons is c/o GCM Grosvenor Inc., 900 North Michigan Avenue, Suite 1100, Chicago, IL 60611.

(c)

Citizenship:

Grosvenor Holdings, L.L.C. is organized under the laws of the state of Illinois. Grosvenor Holdings II, L.L.C., GCM Grosvenor Management, LLC, GCM Progress LLC and GCM Progress Subsidiary LLC are each organized under the laws of the state of Delaware. Michael Jay Sacks is a citizen of the United States.

(d)

Title of class of securities:

Class A Common Stock, par value $0.0001

(e)

CUSIP No.:

36831E108

Item 3.

If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);

(b)

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);

(e)

An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f)

An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g)

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:

(k)

Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

Item 4.

Ownership

(a)

Amount beneficially owned:

Michael Jay Sacks - 142,565,831 Grosvenor Holdings, L.L.C. - 134,858,026 Grosvenor Holdings II, L.L.C. - 3,226,977 GCM Grosvenor Management, LLC - 4,480,828 GCM Progress LLC - 90,155,396 GCM Progress Subsidiary LLC - 90,155,396

(b)

Percent of class:

Michael Jay Sacks - 72.8% Grosvenor Holdings, L.L.C. - 71.7% Grosvenor Holdings II, L.L.C. - 5.7% GCM Grosvenor Management, LLC - 7.8% GCM Progress LLC - 62.9% GCM Progress Subsidiary LLC - 62.9%

(c)

Number of shares as to which the person has:

(i) Sole power to vote or to direct the vote:

Michael Jay Sacks - 0 Grosvenor Holdings, L.L.C. - 0 Grosvenor Holdings II, L.L.C. - 0 GCM Grosvenor Management, LLC - 0 GCM Progress LLC - 0 GCM Progress Subsidiary LLC - 0

(ii) Shared power to vote or to direct the vote:

Michael Jay Sacks - 142,565,831 Grosvenor Holdings, L.L.C. - 134,858,026 Grosvenor Holdings II, L.L.C. - 3,226,977 GCM Grosvenor Management, LLC - 4,480,828 GCM Progress LLC - 90,155,396 GCM Progress Subsidiary LLC - 90,155,396

(iii) Sole power to dispose or to direct the disposition of:

Michael Jay Sacks - 0 Grosvenor Holdings, L.L.C. - 0 Grosvenor Holdings II, L.L.C. - 0 GCM Grosvenor Management, LLC - 0 GCM Progress LLC - 0 GCM Progress Subsidiary LLC - 0

(iv) Shared power to dispose or to direct the disposition of:

Michael Jay Sacks - 142,565,831 Grosvenor Holdings, L.L.C. - 134,858,026 Grosvenor Holdings II, L.L.C. - 3,226,977 GCM Grosvenor Management, LLC - 4,480,828 GCM Progress LLC - 90,155,396 GCM Progress Subsidiary LLC - 90,155,396

Item 5.

Ownership of 5 Percent or Less of a Class.

Item 6.

Ownership of more than 5 Percent on Behalf of Another Person.

Not Applicable

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Not Applicable

Item 8.

Identification and Classification of Members of the Group.

Not Applicable

Item 9.

Notice of Dissolution of Group.

Not Applicable

Item 10.

Certifications:

Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Michael Jay Sacks

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks
Date:	08/08/2025

Grosvenor Holdings, L.L.C.

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

Grosvenor Holdings II, L.L.C.

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

GCM Grosvenor Management, LLC

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

GCM Progress LLC

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

GCM Progress Subsidiary LLC

Signature:	/s/ Michael Jay Sacks
Name/Title:	Michael Jay Sacks Managing Member
Date:	08/08/2025

Comments accompanying signature: 99 Joint Filing Agreement (previously filed).