How to edit the axis in Position?

Player = game.Players.LocalPlayer
repeat
	wait()
until Player.Character
Character = Player.Character
gui = game.ReplicatedStorage.Text:Clone()

while true do
	magnitude = (workspace.CopHat.Position - Character.Torso.Position).magnitude
	if gui.Parent == nil and magnitude < 20 and Character.Torso.Position.Vector3.x > -17.547 then
		gui.Parent = Player.PlayerGui
		gui.FrameOne:TweenPosition(UDim2.new(0.3, 0, 0.75, -5))
		gui.FrameTwo:TweenPosition(UDim2.new(0.45, 0, 0.75, -5))
		gui.FrameThree:TweenPosition(UDim2.new(0.6, 0, 0.75, -5))
		gui.NameLabel:TweenPosition(UDim2.new(0.1, 0, 0.75, -5))
		gui.Textbox:TweenPosition(UDim2.new(0.1, 0, 0.8, 0))
	elseif magnitude >= 20 then
		gui.FrameOne.Position = UDim2.new(0.3, 0, 1, 0)
		gui.FrameTwo.Position = UDim2.new(0.45, 0, 1, 0)
		gui.FrameThree.Position = UDim2.new(0.6, 0, 1, 0)
		gui.NameLabel.Position = UDim2.new(0.1, 0, 1, 0)
		gui.Textbox.Position = UDim2.new(0.1, 0, 1, 0)
		gui.Parent = nil
	end
	print(magnitude, gui.Parent)
	wait(0.1)
end

The problem stems on line 10. I want the gui to show up when the player is close enough, the gui is not in the player's PlayerGui yet, and the player is facing the object (not behind it). My problem is finding out how to define that third qualification. I've tried making the script check the Player's position on the x axis and determine if they are "in front of" the object. The output says that Vector3 is not a valid member of Position. How do I access that x value in Position?