Tal vez lo que necesitas es usar $_SERVER['QUERY_STRING'] ? O $_SERVER['REQUEST_URI'] ?
Código PHP:
<script>
document.location = "<? echo $_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']; ?>";
</script>
// ó
<script>
document.location = "<? echo $_SERVER['REQUEST_URI']; ?>";
</script>
