int array[9][9] = {{0, 2, 0, 4, 0, 0, 0, 0, 0}, {4, 5, 6, 7... и так далее}};

using UnityEngine;
using System.Collections;

public class Grid : MonoBehaviour {
    public int xSize = 5;
    public int ySize = 5;
    private Vector3 initialPos;

    void Start () {
  CreateGrid ();
    }

    void CreateGrid(){

  for (int i = 0; i < ySize; i++) {
   for(int j = 0; j <= xSize; j++){

    Debug.DrawLine(new Vector3(-100000.0f, Mathf.Floor(i/30)*30,0.0f),
                   new Vector3(100000.0f, Mathf.Floor(i/30)*30,0.0f));
    Debug.DrawLine(new Vector3(Mathf.Floor(j/30)*30,-1000000.0f,0.0f),
                   new Vector3(Mathf.Floor(j/30)*30, 1000000.0f,0.0f));

   }
  }
    }
    
    // Update is called once per frame
    void Update () {
    
    }
}

using System;
     
public class Program
{
    public static void Main()
    {

    int[][] data = new int[9][];
      data[0] = new int[] { 0, 2, 0, 4, 0, 0, 0, 0, 0 };
      data[1] = new int[] { 4, 5, 6, 7, 0, 9, 1, 2, 0 };
      data[2] = new int[] { 7, 8, 0, 0, 0, 0, 0, 0, 0 };
      data[3] = new int[] { 0, 0, 0, 5, 0, 7, 0, 0, 0 };
      data[4] = new int[] { 0, 0, 7, 8, 9, 0, 2, 0, 4 };
      data[5] = new int[] { 0, 0, 0, 2, 3, 4, 0, 6, 7 };
      data[6] = new int[] { 3, 0, 0, 0, 0, 0, 0, 0, 0 };
      data[7] = new int[] { 6, 0, 0, 0, 1, 2, 0, 0, 5 };
      data[8] = new int[] { 0, 0, 0, 0, 4, 0, 6, 0, 0 };

    for (int r = 0; r < 9; ++r)  {
    for (int c = 0; c < 9; ++c)  {
      if (data[r][c] == 0)
         Console.Write(" _");
       else
       Console.Write(" " + data[r][c]);
    }
  Console.WriteLine("");
    }
}
}