How to Change Gravity Form Base Directory?

I've just figured out how to do it. Here's the code you need to add to your functions.php file:

add_filter("gform_upload_path", "change_upload_path", 10, 2);
function change_upload_path($path_info, $form_id){
    $upload_dir = wp_upload_dir();
    $dir_base = $upload_dir["basedir"] . "/gravity_forms/"; //change the base path here
    $url_base = $upload_dir["baseurl"] . "/gravity_forms/"; //change the base path here
    $subfolders = wp_hash($form_id)."/".date("Y")."/".date("m")."/";
    $path_info["path"] = $dir_base.$subfolders;
    $path_info["url"] = $url_base.$subfolders;
    return $path_info;
}