Deleting a Prefab when it is dragged to a GUI Texture

So far I know how to do this with a GameObject, but I'm finding it hard to do with GUI Textures, In fact, I'm finding everything about Unity's OnGUI terrible, but whatever. So here's my code with a GameObject:

 using UnityEngine;
 
 using System.Collections;
 
 public class Deleter : MonoBehaviour {
     public GameObject deleter;
     private GameObject object;
 
     void Update() {
 
          object = GameObject.FindWithTag("picked");
         if (object != null) {
                     if (deleter.collider.bounds.Intersects (object.collider.bounds)) {
                                         Destroy (object);
                                 }
         
                         }
                 }
         }
 
 

So How do I do the same but instead of being a GameObject, "deleter" is a GUITexture.

Also I should probably ask which good 'GUI Creators' do you know in the Asset Store?