How would i use a 2D array for level generation

Hey there, i am trying to come up with a script that would generate a grid and eventually rooms which will instantiate in random directions and connecting each other. Thus forming a "dungeon", after a lot of searching i finally found the solution to be a 2D array, i came up with a script that would pick the values of the X and Z axis of the 2D array and form a grid. Pretty easy, now the question is. If i want to check if a certain "slot" or "grid-cell" is occupied with a room. Would i make a second 2D array of bools? Or should i create an Empty GO which contains a script holding a Class with different preferences? Like if the "cell" is occupied and which type of room it is etc...

I recently switched over from Unityscript to C# so i deleted my old script and now i am trying to find an efficient method for taking care of this.

What i have come up so far is this: (like i said in the beginning, it isn't much)

 using UnityEngine;
 using System.Collections;
 
 public class MapGenerator : MonoBehaviour
 {
 
     public int width = 15;
     public int length = 15;
 
     public Room[,] room;
 
     int[,] gridArray;
 
 
     void Awake()
     {
         room = new Room[width,length];
         gridArray = new int[width,length];
     }
 
     void Start()
     {
         Grid();
     }
 
     void Grid()
     {
         for(int z = 0; z < gridArray.GetLength(0); z++)
         {
             for(int x = 0; x < gridArray.GetLength(1); x++)
             {
                 GenerateCells(z, x);
 
             }
         }
     }
 
     void GenerateCells(int z, int x)
     {
         //I thought of putting an instantiating part over here, which will instantiate Empty GO's
     }
 }
 

Now if the best solution is using empty GO's, how would i pass the value of the empty GO to this script? Normally you would use GetComponent and then probably something with [z,x]. But for some reason the last time i tried to use that, it didn't work.

Sorry for the wall of text! Any help is greatly appreciated!

Cheers, Darryl