Gui Text won't turn off

What am I doing wrong here? Why is the Gui text always enabled?

  #pragma strict
  
  var target : Transform;
  var offset = Vector3(0.0, 0.75, 0.0);
  var textObject : GUIText;
 
  function Start(){
      textObject.GetComponent(GUIText).enabled = false;
  }
  
  function Update() {
      var pos = target.position + offset;
      transform.position = Camera.main.WorldToViewportPoint(pos);
      GetComponent.<GUIText>().enabled = (transform.position.z > 0.0);
 }
 
  function OnTriggerEnter2D(other: Collider2D)
  {
  Debug.Log("Trigger Entered!");
      textObject.GetComponent(GUIText).enabled = true;
  }
 
  function OnTriggerExit2D(other: Collider2D)
  {
     textObject.GetComponent(GUIText).enabled = false;
  }