I just found how to do this if someone wants to find out:
gapi.signin.render('botaoLoginUsuarioGoogle', { 'callback': googlePlusSigninCallback, 'clientid': '-----------------------------', 'cookiepolicy': 'single_host_origin', 'requestvisibleactions': 'http://schemas.google.com/AddActivity', 'scope': 'https://www.googleapis.com/auth/userinfo.email', 'approvalprompt': "force" });
According to the documentation, the approvalprompt attribute βAllows you to control when a user is requested to obtain consent. When it is installed automatically, the user sees the OAuth consent dialog if he has not authorized your application. For the forced user, the OAuth consent dialog is displayed to the user every time they press the login button. "
https://developers.google.com/+/web/signin/#sign-in_button_attributes
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