You can get the user's email address if they specifically allow your application to see their email address.
Define your scope:
https://www.googleapis.com/auth/plus.login https://www.googleapis.com/auth/userinfo.email
JavaScript calls are as follows:
gapi.client.load('oauth2', 'v2', function() { gapi.client.oauth2.userinfo.get().execute(function(resp) {
Additional information https://developers.google.com/+ .
Note that you do not need areas for plus.me or userinfo.profile.
source share