How can I add a ChatFilter to a surface gui that is activated with a screengui?

I have a script that is activated by a screen gui you input the text and then click a button and then it will change the text of a surface gui how do i add a chat filter too it? Uses a remote event btw.

ClickButton Script (Local)

local event = game.ReplicatedStorage.message -- Remote Event Location

function click()
    local mess = script.Parent.Parent.TextBox -- Removed the .Text
    event:FireServer("ChangeText",mess.Text) -- Text and argument send here to server.
    script.Parent.Parent.TextBox.Text = ""
end
script.Parent.MouseButton1Click:Connect(click)

Server Script (non-local)

local event = game.ReplicatedStorage.message -- Remote Event Location

event.OnServerEvent:Connect(function(player,arg,text) -- On fire event
    if arg == "ChangeText" then -- Check for argument
        -- Change Text
        workspace.Message.SurfaceGui.Frame.words.Text = tostring(text)
        wait(5)
        workspace.Message.SurfaceGui.Frame.words.Text = ""
    end
end)

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local TextService = game:GetService("TextService")

local sendMessageEvent = ReplicatedStorage.SendPrivateMessage

local function getTextObject(message, fromPlayerId)
  local textObject
  local success, errorMessage = pcall(function()
    textObject = TextService:FilterStringAsync(message, fromPlayerId)
  end)
  if success then
    return textObject
  end
  return false
end

local function getFilteredMessage(textObject, toPlayerId)
  local filteredMessage
  local success, errorMessage = pcall(function()
    filteredMessage = textObject:GetChatForUserAsync(toPlayerId)
  end)
  if success then
    return filteredMessage
  end
  return false
end

-- Called when client sends a message
local function onSendMessage(sender, recipient, message)
  if message ~= "" then
    -- Filter the incoming message and send the filtered message
    local messageObject = getTextObject(message, sender.UserId)

    if messageObject then
      local filteredMessage = getFilteredMessage(messageObject, recipient.UserId)
      sendMessageEvent:FireClient(recipient, sender, message)
    end
  end
end

sendMessageEvent.OnServerEvent:Connect(onSendMessage)