Code Security...

Just wanted to get a "once over" by anyone with time. Anything horrible stick out?

PHP Code:

 <?php 
//Load global.php 
require_once('./global.php'); 

//Clean GET variabls 
$vbulletin->input->clean_array_gpc('g', array( 
'r' => TYPE_NOHTML, 
'g' => TYPE_UINT 
));  

//Login and Redirect 
if (!is_member_of($vbulletin->userinfo, $vbulletin->GPC['g'])) 
{ 
    print_no_permission(); 
} else { 
    header("Location:". $vbulletin->GPC['r']) ; 
} 
?>

Good point, I'm going to force it to only allow redirects to specific domains and directories.

Thank you yet again!