No, this method will not work for verifying your USD bank account for ACH transfers on Gemini.
Why This Method Doesn't Work
Gemini uses an omnibus account to hold all customer USD deposits. As a result, any micro-deposits sent by your bank will not be visible to you. It may be helpful to share this information with your bank, as this verification method is rarely used.
How to Verify Your Bank Account
If your bank account is not verified, it will appear as "Pending" on your Payment Methods page. To enable withdrawals from this account, you will need to send a wire transfer from the bank account to complete the verification process.
Helpful Resources
For additional details on verifying your bank account, refer to these articles: