Hello, thank you for reaching out to Microsoft Q&A.
Please note that a Microsoft account is required to set up and sign in to the device. You cannot use a Google, Yahoo, or other third-party account directly unless it is first added as a Microsoft account.
If you would like to use your existing @gmail.com email address, you can create a Microsoft account using that email address by following these steps:
- Go to https://signup.live.com/ (open the link in an incognito tab)
- Select the option to create a Microsoft account using an existing email address.
- Enter your @gmail.com email address and complete the registration process.
Once added, go to Start > Settings > Accounts > Your info.
- Select "Sign in with a local account instead".
- Follow the steps to complete the local account setup.
Once you're in a local account,
- Go to Start > Settings> Accounts > Your info.
- Select Sign in with your Microsoft account instead.
Then, use the @gmail.com account credentials.
You will be signed in to that account.