How to give player GUi when player touch the part?

First you need Insert Part and put script in side of it

Second you need put the GUi you want give player in Lightning

Then copy this script and put in script inside the part

local Gui =  game.Lighting.GUI

function GiveGui(Player)
	if Player.PlayerGui:FindFirstChild(Gui.Name)~= nil then return end
	Gui:Clone().Parent=Player.PlayerGui
end

script.Parent.Touched:connect(function(hit)
	
	local Player=game.Players:GetPlayerFromCharacter(hit.Parent)
	if Player==nil then return end
	GiveGui(Player)
	
end)

and there you go