as promised... one code to mass remove glines .. please note though that this code will remove EVERY gline plus potentially flood you off the server so its used at your own risk..

menu * {
   Clear Gline: set -u5 %glineclear true | stats 
 }
 raw 223:*:{ if (%glineclear) { gline - $+ $3 } } 

the code will only run for 5 secs though to help limit damage.