trying to set up the game controller from the unity persisting data tutorial

this is the code that i have, and i am almost positive that I have the same as he shows on the screen, but i am getting these errors.. error on line 18, 25 saying argument #1 cannon convert object espression to type unityEngine.object. another error says the best overload method match for unity engine object dontdestroyonload(unity.Engine.object) has some invalid arguments, and finally expression denotes a type where a variable value or method group was expected.

 using UnityEngine;
 using System.Collections;
 
 
 public class GameControl : MonoBehaviour {
 
     public static GameControl control;
 
 
     public  float fish;
     public  float fishPerTap;
     
 
     void Awake ()
     {
         if (control == null) 
         {
             DontDestroyOnLoad (GameObject);
             control = this;
         } 
             else if (control != this) 
             {
                 Destroy(gameObject);
             }
     }
     
 
 }

my question is if you can see where i am messed up on this code. it seemed pretty simple. my first thought is that i was missing a using " fill in the blank" at the top, but he didnt have anything extra added.