How do you set a GUI to visible = true through touched function?

Idk how to do it, I'm pretty new to scripting so. I don't have a script example, it's just a question. But anyway, here's my script, no errors its just not working

local part = game.Workspace.GunKill.Part
local gui = game.StarterGui.Deathgui.Frame
game.Players.PlayerAdded:Connect(function(plr)

part.Touched:Connect(function()
gui.Script.Disabled = false
part:Destroy()
	workspace.GunCock:Play()
	wait(5)
	workspace.Gunshot:Play()
	wait(2)
	plr:Kick("Ending 5, Killed Self")
end)
end)

GUI's script:

script.Parent.Visible = true

try this

partnamehere.Touched:Connect(function(hit)
       local plr = game.Players:GetPlayerFromCharacter(hit.Parent)
       if plr then
               GUInamehere.Visible = true
       end
end