Exhibit 31.1

CERTIFICATION

I, Michael J. Sacks, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q/A of GCM Grosvenor Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.