Billboard Gui Only Visible To Specific Player?

I have a small script here, and I need the billboard to only be visible to a specific player.

Brick = script.Parent
Brick.Touched:connect(function()

end)

I don't know what to do from here, have no idea what to do now.

You can do this in a local script, as filtering enabled prevents anything instanced from the client from showing up on the server. Also, if you were to do it in a local script, you should check if a player touched the part and if it is the local player

local plr = game.Players.LocalPlayer
local brick = workspace.Brick
brick.Touched:Connect(function(hit)
	if hit:IsDescendantOf(plr.Character) then
		local billboardgui = Instance.new("BillBoardGUI")
		--do whatever you want
		billboardgui.Parent = brick
	end
end)

Also, you can clone a preexisting gui with the :Clone function

local plr = game.Players.LocalPlayer
local brick = workspace.Brick
brick.Touched:Connect(function(hit)
	if hit:IsDescendantOf(plr.Character) then
		local billboardgui = game.ReplicatedStorage.BillBoardGui:Clone()
		--do whatever you want
		billboardgui.Parent = brick
	end
end)

A couple of things to take away:

1. use :Connect instead of :connect

2. always use local variables if the scope of the variable is the entire script