Pathfinding in 2d array of GameObjects

Hello, how can i to use pathfinding in 2d array of GO?

     public GameObject tile;
     public GameObject[,] tile_array;
     public float gen_w;
     public float gen_h;
     public int MapW;
     public int MapH;
 
 void TileGen(){
                 for (int r = 0; r < MapW; r++) {
                     for (int c = 0; c < MapH; c++) {
                         float x = (r * (gen_w / 2)) / 100;
                         float y = (c * (gen_h / 2)) / 100;
                 tile_array[r,c] = (GameObject)Instantiate (tile, new Vector3 (x, y, 0), Quaternion.identity); 
                     }
                 }
             }