Overload for method Not Compatible

I am working on a A* implementation, and I am down to one bug in my code that I can not for the life of me figure out. There error is:

 The best overload for the method 'Node.getId(UnityEngine.GameObject)' is not compatible with the argument list '(System.Type)'.

Here are the two scripts:

 #pragma strict
 import System.Collections.Generic;
 
     class Graph
     {
     
         var edges : List.<Edge> = new List.<Edge>();
         var nodes : List.<Node> = new List.<Node>();
         var pathList : List.<Node> = new List.<Node>();
         
         
         function Graph(){}
         
         /*================================================================================*/
         
         function AddNode(id : GameObject, removeRenderer : boolean, removeCollider : boolean)
         {
             var node : Node = new Node(id);
             nodes.Add(node);
             
             //remove colliders and mesh renderer
             if(removeCollider)
                 GameObject.Destroy(id.collider);
             if(removeRenderer)
                 GameObject.Destroy(id.renderer);
         }
         
         /*================================================================================*/
         
         function AddEdge(fromNode : GameObject,  toNode : GameObject)
         {
             var from : Node = findNode(fromNode);
             var to : Node = findNode(toNode);
             
             if(from != null && to != null)
             {
                 var e : Edge = new Edge(from, to);
                 edges.Add(e);
                 from.edgelist.Add(e);
             }    
         }
         
         /*================================================================================*/
         
         function findNode( id : GameObject)
         {
             for(var n : Node in nodes) 
             {
                 if(n.getId() == id)
                 {
                     return n;
                 }
             }
             return null;
         }
         
         
         
 

The issue appears to be in the findNode function. That function references another script pasted below:

 #pragma strict
 import System.Collections.Generic;
 
 class Node
 {
 
     var edgelist : List.<Edge>;
     var path : Node = null;
     var id : GameObject;
     var xPos : float;
     var yPos : float;
     var zPos : float;
     var f : float;
     var g : float;
     var h : float;
     var cameFrom : Node;
     
     function Node(i : GameObject)
     {
         id = i;
         xPos = i.transform.position.x;
         yPos = i.transform.position.y;
         zPos = i.transform.position.z;
         path = null;
     }
     
     function getId(id : GameObject)
     {
         return id;    
     }
 
 
 
 }

I have been beating my head against the wall on this for a while now. Any help you could offer would be greatly appreciated.

Regards, Tony