If you want to use your Gmail address to deliver reports, this is the recommended setup when configuring the whitelabel SMTP settings:
SMTP Server: smtp.gmail.com
SMTP Port: 465
SMTP Security: SSL
SMTP username: [your gmail address]
SMTP password: [your gmail password]
Sender email address: [your gmail address]
More details about Google's recommended SMTP configuration when it comes to sending emails from a third party app can be accessed here.
You can also use the direct sign in option and automatically authorize AWR to use your Google account SMTP settings.