Member Login with Google Account / Gmail

I need to develop a website which embed with a form that allow SOME staffs in my company to fill in. The person in charge will be login to the website by using their google account or gmail.

My problem is :

How to allow the staff to login with their gmail and password ? I don’t know if there is any plugin available ?

I tried OpenID which the user doesn’t need to input any password but just the e-mail. In addition, the user need to have a OpenID account which is troublesome for everyone to register one.

Please provide me some guide or help on how to do this. There might be an alternative way of doing this, mind to share with me ?

Thank you for spending time to read my “How to”.