No, you cannot use an existing email address with Gmail. You will need to create a new Gmail address when you create your Google account.

Yes, you can use Gmail on your mobile device. Gmail has mobile apps for iOS and Android, and you can access Gmail on the web from any mobile browser.

Yes, Gmail is a free email service provided by Google. There are no hidden fees or charges, and you can use it to send and receive emails as much as [...]

Yes, you need a Google account to use Gmail. The Google account is used to sign in to Gmail and access other Google services.