Google Plus Sign-in In Checkbox

I am implementing the google plus sign in my API, the one I am following is this(which accesses in the server-side): https://developers.google.com/+/web/signin/server-side-flow At

Solution 1:

The button needs to render on a block element really. What I would do in your case is use gapi.auth.signIn to trigger the sign in process once somebody clicks on the checkbox.

https://developers.google.com/+/web/signin/javascript-flow

The one downside with that is it can be tricky to work with pop up blockers at times. If that's the the case then what I would do is have selecting the checkbox bring up a lightbox or similar with the sign in button in it rendered as you had before.