No!


Gmail is the free email service offered by Google, and many people use it for personal or work email.


However, you do not have to have a Gmail account to use Google tools such as Google Drive (or login to FreshDesk). 


Just like most other web sites, you can use any email address to sign up and login to Google and use their tools (including Google Drive).


Use this web site to register your existing email address with Google:


     https://accounts.google.com/SignUpWithoutGmail


After you complete the registration process, you can login to Google and use tools such as Google Drive, and login to FreshDesk to create tickets.