how do i display this as GUI

Sorry for the inpasific “this” but anyway I have an inventory script that I believe works but Im not sure how to display as GUI for the actual inventory part that people can see in game.
Heres the code I have-
using UnityEngine;

using System.Collections;

using System.Collections.Generic;

public class Inventory : MonoBehaviour {
// This struct holds the information about an object in the inventory:

public struct InventoryItem

{

    // This is a reference to the item info provided by your class

    // It should contain information on the item type, and also a picture for use in the inventory.

    public Item Item_Info;



    // Quantity of item held:

   public int Number_Held;



    // Location of the item in the inventory grid:

    public int X_Location;

    public int Y_Location;

    public InventoryItem(Item item,int number, int x_Loc, int y_Loc)

    {

        Item_Info = item;

        Number_Held = number;

        X_Location = x_Loc;

        Y_Location = y_Loc;

    }



    // Increase the number of objects held (or decrease, by passing a negative number):

    public void IncreaseNumber(int number)

    { Number_Held += number; }

}



public Dictionary<string, InventoryItem> m_Inventory = new Dictionary<string, InventoryItem>();



int next_Free_X = 0;

int next_Free_Y = 0;

int width = 10;



void OnTriggerEnter (Collider pCollider) 

{

    // Check that the object can be picked up here

    if(true)  

   {

       // If we already have this object, increase the number we have

        if(m_Inventory.ContainsKey(pCollider.name))

       {

            m_Inventory[pCollider.name].IncreaseNumber(1);

        }

       else

        {

            // If we don't have this object, add a new entry to the inventory

            m_Inventory.Add(pCollider.name, new InventoryItem(GetItemInfo(pCollider), 1, next_Free_X, next_Free_Y));

        

            // Find the next free inventory slot for new items:

            next_Free_X++;

            if(next_Free_X >= width)

            {

                next_Free_X = 0;

                next_Free_Y++;

            }
        }

       // Destroy the object picked up:

       Destroy(pCollider.gameObject);

    }

}

private Item GetItemInfo(Collider pCollider)

{

// You will need to implement this, you could either have a central list (contained in a gameObject)

// holding references to all possible items, or you could retrieve the information from the object you hit

// with:

return pCollider.GetComponent();

}

}

how do I display this into GUI.

To be able to display Items on the GUI, you would have to put a OnGUI() method somewhere on your script.

 void OnGUI() 
    {
        if (GUI.Button(new Rect(10, 10, 150, 100), "I am a button"))
            print("You clicked the button!");
        
    }

More Info on how to use the GUI can be found here and here ,