As long as GF is still working the way it worked in that post. I’m not very familiar with GF, I can help you get things out of ACF but putting them somewhere else…
When getting the value for a user you need to give ACF the $post_id argument.
add_filter('gform_field_value_dept_name', 'my_user_info');
function my_user_info($value){
$id = get_current_user_id();
$post_id = 'user_'.$id;
return get_field('dept_name', $post_id);
}
see getting values from other places on this page http://www.advancedcustomfields.com/resources/get_field/
