gistfile1.php

<?php
// $client is authenticated with scopes "profile" and "email"
$service = new Google_Service_Plus($client);

$user = $service->people->get("me");
$name = $user->displayName;
$family_name = $user->name->familyName;
$given_name = $user->name->givenName;
$picture = $user->image->url;
// There can be > 1 email address, we want the main one
foreach($user->emails as $em) {
  if($em->type == "account") {
    $email = $em->value;
  }
}