Gravity Forms – Populate Name Field - Retrieving user meta information 1.

functions.php

function eo_get_usermeta($meta_key)
{
  $current_user = wp_get_current_user();
  $ret = (($current_user instanceof WP_User) && (0 != $current_user->ID)) ?
    $current_user->__get($meta_key) : '';
  
  return $ret;
}