Pre-populate Gravity Form

/* Pre-populate form 25 with user meta data from currently logged in user */
add_filter("gform_pre_render_25", "sunrise_prepopulate_form_from_user_meta");
function sunrise_prepopulate_form_from_user_meta($form) {
  global $current_user;
  get_currentuserinfo();
  global $post;
  foreach($form["fields"] as &$field) {
    if($field["inputName"] != "") {
      $thisInput = explode("__", $field["inputName"]);
      if($thisInput[0] == 'usermeta') {
        $_GET[$field["inputName"]] = $current_user->__get($thisInput[1]);
      } elseif($thisInput[0] == 'personmeta' && $post->post_type == 'people') {
        $_GET[$field["inputName"]] = get_post_meta($post->ID, $thisInput[1], true);
      } elseif($thisInput[0] == 'organizationmeta' && $post->post_type == 'organizations') {
        $_GET[$field["inputName"]] = get_post_meta($post->ID, $thisInput[1], true);
      }
    }
  }

  return $form;
}