How can I make my Gui only show up when the player enters the game?

I have tried googling around and haven't found anything that works, I've tried putting it in lighting and cloning it into the player's PlayerGui when they join using game.Players.PlayerAdded etc. I've pretty much given up, and I need to have this done soon because it's for a group I'm helping out because they freemodel a lot.

Thanks for checking this out, and double thanks if you can fix it.

Thank you to Wizzy11 for helping me out, if you are also having this issue I put what I did in a comment below him.

What you've done is exactly correct, if you do put the Gui in Lighting and then Clone it into the player's PlayerGui when they first join it should work.

game.Players.PlayerAdded:connect(function(player)
	game.Lighting.GUINAME:Clone().Parent = player.PlayerGui
end)

A simple script such as this should do the trick fine!