Also I could do it myself if I knew a way to receive everything I needed via POST or something.
EDIT: I was able to figure it myself. I modified Google's "Google Plus PHP Starter". and wrote this snippet to get all user info needed
$token = $client->getAccessToken();
$token = json_decode($token, true);
$token = $token['access_token'];
$info = json_decode(file_get_contents('https://www.googleapis.com/oauth2/v1/us ... n='.$token), true);
I still have yet to implement this into the login system, but I have everything I need.