pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: Gores Metropoulos II, Inc.

Commission File No.: 001-39907

Date: December 23, 2021

Really excited to share that we’re one step closer to taking Sonder public. The registration statement related to our business combination with Gores Metropoulos II was declared effective by the SEC on December 22, 2021 and we’re looking forward to taking the next steps towards listing.

Without getting too far down the road (we still need to obtain the vote of Gores Metropoulos II’s stockholders), when we list, we would love for key supporters such as yourself to join us in NYC to celebrate our listing, so watch for details on this to come.

We’ve also gotten a few asks on how our partners can coordinate communications with us when we list. We’d welcome and love the support! For those interested, your PR teams should feel free to reach out to our Communications team at press@sonder.com.

Lastly, a massive thank you to all of you for your support of Sonder over the years. It’s been critical to helping us come this far in our mission to revolutionize hospitality. I feel truly privileged to have been given your trust and confidence to pursue this goal.

Francis

#END#

Additional Information and Where to Find It

In connection with the proposed business combination, Gores Metropoulos II, Inc. has filed a registration statement on Form S-4 (the “Registration Statement”) that includes a preliminary proxy statement, prospectus and consent solicitation statement with respect to Gores Metropoulos II’s securities to be issued in connection with the proposed business combination. The Form S-4 was declared effective by the SEC on December 22, 2021. When available, the definitive proxy statement/prospectus/consent solicitation statement will be mailed to Gores Metropoulos II stockholders as of a record date to be established for voting on the proposed business combination and the other matters to be voted upon at the Special Meeting. Investors and securityholders will also be able to obtain copies of the definitive proxy statement/prospectus/consent solicitation statement and all other relevant documents filed or that will be filed with the SEC without charge, once available, at the SEC’s website at www.sec.gov or by directing a request to: 6260 Lookout Road, Boulder, CO 80301, attention: Jennifer Kwon Chou, or by contacting Morrow Sodali LLC, Gores Metropoulos II’s proxy solicitor, for help, toll-free at (800) 662-5200 (banks and brokers can call collect at (203) 658-9400).

Participants in Solicitation

Gores Metropoulos II, Sonder and their respective directors and officers may be deemed participants in the solicitation of proxies of Gores Metropoulos II stockholders in connection with the proposed business combination. Gores Metropoulos II stockholders and other interested persons may obtain, without charge, more detailed information regarding the interests of those persons and other persons who may be deemed participants in the proposed business combination by reading Gores Metropoulos II’s registration statement on Form S-1 (File No. 333-251663), which was declared effective by the SEC on January 19, 2021, and the proxy statement/prospectus/consent solicitation statement regarding the proposed business combination. You may obtain free copies of these documents as described in the preceding paragraph.

Forward-Looking Statements

This press release contains a number of “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, statements about Sonder’s forecasted revenue growth and cash flow (including Sonder’s outlook for Total Revenue and Adjusted EBITDA for the year ended December 31, 2021), Sonder’s forecasted growth in units (including Sonder’s forecast for growth in Total

VC Partner Email—S4 Effectiveness—sent by Francis

Portfolio for the year ended December 31, 2021), information concerning Gores Metropoulos II’s or Sonder’s possible or assumed future financial or operating results and metrics, business strategies, debt levels, competitive position, industry environment, potential growth opportunities, future operations, products and services, planned openings, expected unit contractings and the effects of regulation, including whether the proposed business combination will generate returns for stockholders. These forward-looking statements are based on Gores Metropoulos II‘s or Sonder’s management’s current expectations, estimates, projections and beliefs, as well as a number of assumptions concerning future events. When used in this press release, the words “estimates,” “projected,” “expects,” “anticipates,” “forecasts,” “plans,” “intends,” “believes,” “seeks,” “may,” “will,” “should,” “future,” “propose” and variations of these words or similar expressions (or the negative versions of such words or expressions) are intended to identify forward-looking statements. These forward-looking statements are not guarantees of future performance, conditions or results, and involve a number of known and unknown risks, uncertainties, assumptions and other important factors, many of which are outside Gores Metropoulos II’s or Sonder’s management’s control, that could cause actual results to differ materially from the results discussed in the forward-looking statements. These risks, uncertainties, assumptions and other important factors include, but are not limited to: (a) the occurrence of any event, change or other circumstances that could give rise to the termination of the Merger Agreement (as amended by that certain Amendment No. 1 to Agreement and Plan of Merger, dated October 27, 2021 (“Amendment No. 1”)) and the proposed business combination contemplated thereby; (b) the inability to complete the proposed business combination due to the failure to obtain approval of the stockholders of Gores Metropoulos II or other conditions to closing in the Merger Agreement (as amended by Amendment No. 1); (c) the ability to meet Nasdaq’s listing standards following the consummation of the proposed business combination; (d) the inability to complete the private placement transactions in connection with the business combination as described in the Registration Statement; (e) the risk that the proposed business combination disrupts current plans and operations of Sonder or its subsidiaries as a result of the announcement and consummation of the transactions described herein; (f) the ability to recognize the anticipated benefits of the proposed business combination, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably, maintain relationships with customers and suppliers and retain its management and key employees; (g) costs related to the proposed business combination; (h) changes in applicable laws or regulations, including legal or regulatory developments (such as the SEC’s statement on accounting and reporting considerations for warrants in special purpose acquisition companies); (i) the possibility that Sonder may be adversely affected by other economic, business and/or competitive factors; (j) risks related to the impact of the COVID-19 pandemic, including the Delta variant and potential governmental and other restrictions (including travel restrictions) resulting therefrom; and (k) other risks and uncertainties described in the final proxy statement/prospectus/consent solicitation statement, including those under the heading “Risk Factors” therein, and other documents filed by Gores Metropoulos II from time to time with the SEC. You are cautioned not to place undue reliance upon any forward-looking statements, which speak only as of the date made. Except as required by law, neither Gores Metropoulos II nor Sonder undertakes any obligation to update or revise its forward-looking statements to reflect events or circumstances after the date of this report. Additional risks and uncertainties are identified and discussed in Gores Metropoulos II’s reports filed and to be filed with the SEC and available at the SEC’s website at www.sec.gov.

Disclaimer

This communication relates to a proposed business combination between Gores Metropoulos II and Sonder. This document does not constitute an offer to sell or exchange, or the solicitation of an offer to buy or exchange, any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, sale or exchange would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.