local module = {}

function module.rexuzs(target)
    _G.target = target
    local target = game.Players:WaitForChild(_G.target)
    script.ScreenGui:Clone().Parent = target:WaitForChild("StarterGui")
end

return module

If don't work use this other one if u die the gui close

local module = {}

function module.rexuzs(target)
    _G.target = target
    local target = game.Players:WaitForChild(_G.target)
    script.ScreenGui:Clone().Parent = target.PlayerGui
end
return module