transform.position error

Hey there. I have a system set up that creates an array of objects that forms a grid. I'm trying to make the grid start on the position of the gameObject that it's attached to, but I'm having trouble referring to the gameObject. Here's my code.

 using UnityEngine;
 using System.Collections;
 
 public class GridCreator : MonoBehaviour
 {
     
     public int width = 10;
       public int height = 10;
     public Cell[,] cells;
     public GameObject unit;
     
     public class Cell
        {
         public Vector3 pos;
         public int sizeMod = 1;
         
         public Cell(int x, int y)
            {
             pos = new Vector3((x*sizeMod)+gameObject.transform.position.x,0,(y*sizeMod)+gameObject.transform.position.y);
            }
     }
         
 
     void Awake ()
        {
         cells = new Cell[width, height];
            for (int y = 0; y < height; ++y)
         {
                for (int x = 0; x < width; ++x)
                {
                    cells[x,y] = new Cell(x, y);
                 GameObject newunit = Instantiate(unit, cells[x,y].pos, Quaternion.identity) as GameObject;
             }
         }   
     }
 }

The grid works and instantiates Units correctly if I take the additives (+gameObject.transform.position.x/y) out of the equation here

    pos = new Vector3((x*sizeMod)+gameObject.transform.position.x,0,(y*sizeMod)+gameObject.transform.position.y);

But when I leave them in I get this error

Cannot access a nonstatic member of outer type `UnityEngine.Component' via nested type `GridCreator.Cell'

Am I trying to access the variable incorrectly? Not sure what I'm doing wrong. Thanks for any help.