If you cant not login to gmail via your outlook , and you got a message asking you to visit
https://support.google.com/mail/bin/answer.py?hl=en&answer=78754
This means your account maybe blocked,
you can follow these steps to fix it
- login to your gmail via webmail
if you see any captcha ,enter it and login to webmail
if this step does t fix your problem , go to your Account Settings and change to a new password
Hope it help