Navigating GUI with gamepad on GUI.Toggle

I've been trying to add to this script provided by Farfarer in 2011 so that I can navigate a GUI menu with a gamepad and toggle a GUI.Toggle button on and off with a gamepad BUTTON vs. the left mouse-button click.

An edit to this script done by chelnok is closest to what I want because it allows me to execute a GUI button with the gamepad but I can't get it to work with a toggle.

Here is the script;

     // Array of menu item control names.
     var menuOptions = new String[4];
      
     menuOptions[0] = "Tutorial";
     menuOptions[1] = "Play";
     menuOptions[2] = "High Scores";
     menuOptions[3] = "Exit";
      
     // Default selected menu item (in this case, Tutorial).
      
     var selectedIndex = 0;
      
     // Function to scroll through possible menu items array, looping back to start/end depending on direction of movement.
      
     function menuSelection (menuItems, selectedItem, direction) {
      
         if (direction == "up") {
             if (selectedItem == 0) {
                 selectedItem = menuItems.length - 1;
             } else {
                 selectedItem -= 1;
             }
         }
        
         if (direction == "down") {
             if (selectedItem == menuItems.length - 1) {
                 selectedItem = 0;
             } else {
                 selectedItem += 1;
             }
         }
      
         return selectedItem;
     }
      
      
      
     function Update ()
     {
         if (Input.GetKeyDown("down")) {
             selectedIndex = menuSelection(menuOptions, selectedIndex, "down");
         }
      
         if (Input.GetKeyDown("up")) {
             selectedIndex = menuSelection(menuOptions, selectedIndex, "up");
         }
      
         if (Input.GetKeyDown("space")) {   
             handleSelection();
         }
     }
      
     function handleSelection()
     {
         GUI.FocusControl (menuOptions[selectedIndex]);
        
         switch (selectedIndex)
         {
             case 0:  
                    Debug.Log("Selected name: " + GUI.GetNameOfFocusedControl () + " / id: " +selectedIndex);
                    break;
             case 1:
                    Debug.Log("Selected name: " + GUI.GetNameOfFocusedControl () + " / id: " +selectedIndex);
                    break;
             case 2:
                    Debug.Log("Selected name: " + GUI.GetNameOfFocusedControl () + " / id: " +selectedIndex);
                    break;
             case 3:
                    Debug.Log("Selected name: " + GUI.GetNameOfFocusedControl () + " / id: " +selectedIndex);
                    break;         
             default:
                    Debug.Log ("None of the above selected..");
                    break;
         }
     }
      
     function OnGUI ()
     {
         GUI.SetNextControlName ("Tutorial");
         if (GUI.Button(Rect(10,70,170,30), "Button 1 (tutorial,id:0)")) {
             selectedIndex = 0;
             handleSelection();
         }
      
         GUI.SetNextControlName ("Play");
         if (GUI.Button(Rect(10,100,170,30), "Button 2 (play, id:1)")) {
             selectedIndex = 1;
             handleSelection();
         }
      
         GUI.SetNextControlName ("High Scores");
         if (GUI.Button(Rect(10,130,170,30), "Button 3 (high scores, id:2)")) {
             selectedIndex = 2;
             handleSelection();
         }
      
         GUI.SetNextControlName ("Exit");
         if (GUI.Button(Rect(10,160,170,30), "Button 4 (exit, id:3)")) {
             selectedIndex = 3;
             handleSelection();
         }
      
         GUI.FocusControl (menuOptions[selectedIndex]);
     }

Any help with this would be very much appreciated!! :)