Global Manager singleton if necessary

GM.sc

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class GM : MonoBehaviour
{
    public const int STAGE_ATTRACTOR = 1;
    public const int STAGE_HUMAN_DETECTED = 2;
    public const int STAGE_BUTTON_INTERACT = 3;
    public const int STAGE_POPUP_SHOWN = 4;

    public int gameStage;
    public XMLStruct config;
    public Text debugText;

    private static GM _instance;

    public static GM inst { get { return _instance; } }


    public void Log(string meh)
    {
       inst.debugText.text += meh + "\n";
    }

    private void Awake()
    {
        if (_instance != null && _instance != this)
        {
            Destroy(this.gameObject);
        }
        else
        {
            _instance = this;
        }
    }
}