in gilupdate.php make sure you change this to the groups that should have access to teh script.
PHP Code:
if ($bbuserinfo[usergroupid]==5 OR $bbuserinfo[usergroupid]==6 OR $bbuserinfo[usergroupid]==7)
I believe people not listed wont see the box to enter but if i'm mistaken you can use vb3 template conditionals around $gilbox variable. I could probably dig some out if needed.