Are you searching for google+ login page? Do you really want to join google plus? As far as google is concern, every service of google has a login page. Same is here for google+ login.
So if you wana know that how to login to your google+ then Here is a link of google+ login page. And you just have to enter your user name and password in the google+ login page. And you will see that if you are a part of google+ network or not.
If you have not invited by anyone then please read our this post about How to signup for Google+ without invites.
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