Show Score While Holding 'TAB' Using GUI Text Through Script

Hi there guys, i'm having an issue both on researching and coding a stats page that gets displayed while holding 'TAB', I have a panel with Scripted GUIText that gets displayed while holding tab, but i am wondering how i can attach GUI texts to that panel? So that whatever the native resolution, it will stay attached to that panel, I need a way of changing the stats through code, so it cant be as simple as using UI text due to as far as i know UI Text cannot be modified through script. below is a video the may be more clear in what i am trying to achieve.

https://youtu.be/uJ9rZwxczDw

Code Below to show where i am at.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class ScoreSys : MonoBehaviour {
 
     //Reqs
     public GameObject stats;
 
     //Player Stats
     public float gameMoney = 0;
     public float gameScore = 0;
     public float gameExp = 0;
     public float currentMoney = 0;
     public float currentScore = 0;
     public float currentExp = 0;
     public float currentLvl = 0;
     public float currentPrestige = 0;
 
     //Gun Stats
     public float apcBulletsShot = 0;
     public float apcBulletsHit = 0;
 
     //Zombie Stats
     public float zKills = 0;
     public float zHeadKills = 0;
 
 
     private GUIStyle guiStyle = new GUIStyle();
     private void OnGUI()
     {  
         guiStyle.fontSize = 15;
         guiStyle.normal.textColor = Color.white;
         GUI.contentColor = Color.white;
         if (Input.GetButton("Stats"))
         {
             GUI.Label(new Rect(25, 490, 260, 100), "Score This Game:" + gameScore, guiStyle);
             GUI.Label(new Rect(25, 470, 260, 100), "Money This Game:" + gameMoney, guiStyle);
             GUI.Label(new Rect(25, 450, 260, 100), "Exp This Game:" + gameExp, guiStyle);
         }
     }
 
     // Use this for initialization
     void Start () {
         stats.SetActive(false);
     }
     
     // Update is called once per frame
     void FixedUpdate () {
         if (Input.GetButton("Stats"))
         {
             stats.SetActive(true);
         }
         else
         {
             stats.SetActive(false);
         }
     }
 }