Accessing GameObjects in my List

I get a NullReferenceException error in my last line of code. I'm assuming I'm trying to access the bool in the other script incorrectly, but I don't know how else to do it.

 public class GoList : MonoBehaviour {
     public GameObject[] enemyList;
     public int enemyListLength;
 
     // Use this for initialization
     void Awake () {
         enemyList = GameObject.FindGameObjectsWithTag ("Enemy");
         enemyListLength = enemyList.Length;
 
         List<GameObject> GObj = new List<GameObject> ();
 
         for (int i = 0; i < enemyListLength; i++){
             GObj.Add (enemyList[i]);
         }
 
         GObj.Sort (SortMethod);
 
         foreach (GameObject go in GObj) {
             print (go.name);        
         }
 
         GObj[0].GetComponent<PlayerTurn>().goFirst = true;
 
     }