Is it possible to edit all players gui without remote events?

EDIT: I HATE ADS!!!!!!!!

You might have to put everything into two or more scripts, because it just won't work in one (well, it might). It is a little messy. I say instead of using Events or RemoteEvents, use Values and the .changed function trigger. Like so:

This is for something like a rounds game with two teams:

Import these lines of code in the Command Prompt (Note that you can do any value type or name you want):

local sValue = Instance.new("BoolValue", game.ServerStorage) -- This is the Value for Server-Side scripts to access. sValue.Name = "Team1Won"

local lValue = Instance.new("BoolValue", game.ReplicatedStorage) -- This is the value for Client-Side Scripts to access. lValue.Name = "Team1Won"

local sValue2 = Instance.new("BoolValue", game.ServerStorage) -- This is the Value for Server-Side scripts to access. sValue.Name = "GameInProgress"

local lValue2 = Instance.new("BoolValue", game.ReplicatedStorage) -- This is the value for Client-Side Scripts to access. lValue.Name = "GameInProgress"

Whenever you want to say that "Team 1 won the game!", you can just set this value to true.

However, we need to do something about the fact that team 1 won/lost.

Inside the player's GUI, (via StarterGUI) we need to make changes. You can add whatever suits you from here, or change the scripts to your needs.

For Client-Side Scripts :

local lv1 = game.ReplicatedStorage:FindFirstChild(" "--[[Whatever your name was]])
local lv2 = game.ReplicatedStorage:FindFirstChild(" "--[[Whatever your name was]])

lv2.Changed:Connect(function(property)
	if lv2.Value = false then --Whatever value you want, really
		if lv1 = true then
			-- Add your own code for Team One's loss
		end

		if lv2 = true then
			--Add your own code for Team One's viscory
		end
	end
end)

For Server-Side Scripts :

local sv1 = game.ServerStorage:FindFirstChild(" "--[[Whatever your name was]])
local sv2 = game.ServerStorage:FindFirstChild(" "--[[Whatever your name was]])

sv2.Changed:Connect(function(property)
	if sv2.Value = false then --Whatever value you want, really
		if sv1 = true then
			-- Add your own code for Team One's loss
		end

		if sv2 = true then
			--Add your own code for Team One's viscory
		end
	end
end)