How to make it so a PlayerGui Text is the same as a SurfaceGui's text?

I'm trying to make it so the PlayerGui TextLabel says 4 and SurfaceGui TextLabel says 4 i shoot the gun the PlayerGui text turns into 3 and the SurfaceGui's TextLabel changes to 3 as well and know that im not that good at scripting and im using the Template Assault Rifle script. I tried it and i get this error

02:30:07.736 - WeaponHud is not a valid member of PlayerGui

local Player = game.Players.LocalPlayer
local GUI = Player.PlayerGui
local ClipAmmo = GUI.WeaponHud.AmmoHud.ClipAmmo
local TextLabel = script.Parent

GUI:WaitforChild("AmmoHud")

while true do
TextLabel.Text = ClipAmmo	
end

you are setting the textlabels text to the clipammo, not the clipammo text.

local Player = game.Players.LocalPlayer
local GUI = Player.PlayerGui
local ClipAmmo = GUI.WeaponHud.AmmoHud.ClipAmmo.Text
local TextLabel = script.Parent

GUI:WaitforChild("AmmoHud")

while true do
TextLabel.Text = ClipAmmo   
end

-- This will need to be in local script


local Player = game.Players.LocalPlayer
local GUI = Player.PlayerGui
local ClipAmmo = GUI.WeaponHud.AmmoHud.ClipAmmo.Text
local TextLabel = script.Parent

GUI:WaitforChild("AmmoHud")

while true do
TextLabel.Text = ClipAmmo   
end

If still not working:

-- This will need to be in local script


local Player = game.Players.LocalPlayer
local GUI = game:GetService("StarterGui")
local ClipAmmo = GUI.WeaponHud.AmmoHud.ClipAmmo.Text
local TextLabel = script.Parent

GUI:WaitforChild("AmmoHud")

while true do
TextLabel.Text = ClipAmmo   
end

AND IF STILL NOT WORKING

-- This will need to be in local script


local Player = game.Players.LocalPlayer
local GUI = game:GetService("PlayerGui")
local ClipAmmo = GUI.WeaponHud.AmmoHud.ClipAmmo.Text
local TextLabel = script.Parent

GUI:WaitforChild("AmmoHud")

while true do
TextLabel.Text = ClipAmmo   
end