for i, v in pairs(table of stuff, each of the stuffs having a StringValue object in them called GUIType) do
	print(v.GUIType.Value) -- 'TitleScreen' for all of them
	 if v.GUIType.Value == 'TItleScreen' then -- Returns false, even though it is in fact TitleScreen
		v.Visible = false
	end
end

Pretty self explanatory. halp