How do I make it so this Soft shutdown script enables a gui?

How do I make it so this Soft shutdown script to instead of making a message to enable a gui

I tried to use a fireclient thing but it did not work it would not enable the gui and I tried everytihing else Soft shut down script:

local TeleportService = game:GetService("TeleportService")
local Players = game:GetService("Players")

if (game.VIPServerId ~= "" and game.VIPServerOwnerId == 0) then
	-- this is a reserved server without a VIP server owner
	for _,player in pairs(Players:GetPlayers()) do
		game.ReplicatedStorage.Servershutingdown:FireClient(player.Name)
	end
	local waitTime = 5

	Players.PlayerAdded:connect(function(player)
		wait(waitTime)
		waitTime = waitTime / 2
		TeleportService:Teleport(game.PlaceId, player)
	end)
	
	for _,player in pairs(Players:GetPlayers()) do
		TeleportService:Teleport(game.PlaceId, player)
		wait(waitTime)
		waitTime = waitTime / 2
	end
else
	game:BindToClose(function()
		if (#Players:GetPlayers() == 0) then
			return
		end
		
		if (game:GetService("RunService"):IsStudio()) then
			return
		end
		
		for _,player in pairs(Players:GetPlayers()) do
			game.ReplicatedStorage.Servershutingdown:FireClient(player.Name)
		end
		wait(2)
		local reservedServerCode = TeleportService:ReserveServer(game.PlaceId)
		
		for _,player in pairs(Players:GetPlayers()) do
			TeleportService:TeleportToPrivateServer(game.PlaceId, reservedServerCode, { player })
		end
		Players.PlayerAdded:connect(function(player)
			TeleportService:TeleportToPrivateServer(game.PlaceId, reservedServerCode, { player })
		end)
		while (#Players:GetPlayers() > 0) do
			wait(1)
		end	
		
		-- done
	end)
end

client event script

game.ReplicatedStorage.Servershutingdown.OnClientEvent:Connect(function(plr)
	if plr == game.Players.LocalPlayer.Name then
		script.Parent.Enabled = true
	end
end)

I Figured out the problem