How do i make it so a gui opens when someone clicks a gui?

Alright so you first have to define the gui.You didnt give to much information about it but here's how to do it.

local gui = script.Parent.Parent.Parent("Your name")  --type parent til you reach the playergui then the name of the gui.

function onClicked()
	gui.Enabled = true
	script.Parent.Visible = false --is this what you want?
end

script.Parent.MouseButton1Click:Connect(onClicked) -- also put the script inside the button.

I typed it with parent because it's gonna be parented to "PlayerGui" when you start the game. Say if you