How do you make a GUI that is exclusive for a team??

I am trying to make a GUI that is exclusive for a team. Like a GUI that become visible if a player is on a certain team. Here what I thought to do:

local Players = game:GetService("Players")
local Teams = game:GetService("Teams")

if Players.LocalPlayer.Teams == BrickColor.new("New Yeller")then
	game.StarterGui.Buttons.Host.Visible = true
else
	game.StarterGui.Buttons.Host.Visible = false
end

No result in input but nothing happened. I also tried putting it in both types of script with again, no result. I also experimented with at least an error

local team = game.Teams.Host
local Players = game:GetService("Players")

if Players.LocalPlayer.team == game.team then  --Error here (Workspace.Script:4: attempt to index field 'LocalPlayer' (a nil value))--
	    game.StarterGui.Buttons.Host.Visible = true
else	    
	game.StarterGui.Buttons.Host.Visible = false
end

What am I doing wrong?

I was able to answer my own question. I decided to use a button that would only work if you where on the host team. Here's the code that you can edit if you have the same problem

local frame = script.Parent.Parent.Parent.Host
	local open = false
	local others = game.Teams.Contestant
	local others = game.Teams.Judge
	local others = game.Teams.Audience
	local Person = game.Players.LocalPlayer
	local Main = game.Teams.Host
	 
	 
	script.Parent.MouseButton1Click:Connect(function()
	    if Person.Team == Main then
	        frame.Visible = true
	    elseif
	        Person.Team == others then
	            frame.Visible = false
	script.Parent.Text = "Not right team."
	wait(1)
	script.Parent.Text = "Open Host Gui"
	    end
	end)

It's been a fairly long time since i've developed on this site, but if I recall Teams don't use BrickColor, they use 'TeamColor'

Lets start with just getting 'Players' defined real quick. local Players = game:GetService("Players").LocalPlayer

That right there removes portions of your code later on since I defined it as 'LocalPlayer' immediately.

Now lets try to figure out if the players Team is the right color.

if Players.Teams.TeamColor == (Players.Teams.TeamColor = "New Yeller") then

If i'm correct about TeamColor, then this Should work, I say should because this might be an improper way of doing what I'm trying to get across and if so I apologize, like I said it's been a very long while.

The rest of this is exactly as you were trying to do and just saying 'if the team is the right color show them this Gui, if not then don't '

game.StarterGui.Buttons.Host.Visible = true
	else
		game.StarterGui.Buttons.Host.Visible = false

Now, heres the code all together.

local Players = game:GetService("Players").LocalPlayer
if Players.Teams.TeamColor == (Players.Teams.TeamColor = "New Yeller") then
	game.StarterGui.Buttons.Host.Visible = true
	else
		game.StarterGui.Buttons.Host.Visible = false
end

You could just detect when a player joined and check their team, then clone the gui to their playergui. So if you are that team and join the game you have it, or switch teams.

team = <team color here>
gui = <the location of the gui> (dont put it in startergui)

game.Players.PlayerAdded:Connect(function(player)
	if player.Team.TeamColor == team then
		local clone = gui:Clone()
		clone.Parent = player.PlayerGui
	end
end)

This, or something like this should work.