GUI Appear Help

im trying to make GUI appear after the gameobject was been destroyed. heres my script im using:

 var MaxHealth : int = 500;
 
 var CurrentHeath : int;
 
 
 function Start () {
 
 CurrentHeath = MaxHealth;
 
 
 }
 
 function ApplyDamage ( Damage : float ) {
 
 
 if( CurrentHeath < 0){
 
 
     return;
  }
 
 CurrentHeath -= Damage;
 
 if( CurrentHeath == 0 ){
 
 
 Destroy( gameObject) ;
 
 }
 
 }

thanks for your help

P.S im new to scripting