Cloned GUI wont go away?

You press G and this GUI comes up. I want it so when you press it again the GUI will disappear. Instead it just makes another one come up and you can virtually make an infinite amount of these GUI's appear. Any way to fix this here? Here's the code:

local guis = game.ReplicatedStorage.GUIs
local player = script.Parent.Parent
local phoneactive = script.Parent:FindFirstChild("Phone")

function onKeyPress(inputObject, gameProccessedEvent)
	if not gameProccessedEvent then -- If not using an event, run this code
		if inputObject.KeyCode == Enum.KeyCode.G then
				if phoneactive then
					script.Parent.Phone:Destroy()
				else
					local help = guis.Phone:Clone()
					help.Parent = player.PlayerGui
					player.PlayerGui.PlayerAudio.Pullup:Play()
			end
		end
	end
end

game:GetService("UserInputService").InputBegan:connect(onKeyPress)

Any help is appreciated :)

Alright brother. Here ya go. When you use this script, what you have to do is have a ScreenGui, within the screengui, have the frame you want to be opened and name that Frame and this script goes into a Local Script. The Local Script's parent needs to be the screengui. Then bam. It works.

local GUI = script.Parent
local Frame = GUI:WaitForChild("Frame")
local Buttons = Frame:GetChildren()
local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()




Mouse.KeyDown:connect(function(key)
	if key == "l" then
		Frame.Visible = not Frame.Visible
	end
end)

If you have any questions just come ask me.