Is there a function similar to FindFirstChild that can be used without a string?

Is there any other function beside FindFirstChild that doesn't require a string? I need it because I want this script to work universally so I won't have to keep changing the Guis name.

Ok,so this is how the script works it finds the player distance from the current part if distance is less then 4 then it will clone the Gui into the Players Gui and then it will see if the player has the Gui by checking the Guis name,however if the the player already has a gui with the same name it won't work,is there another way to do it? The script is setup like this.

For example: A function where you able to tag a object and make it find it first?

 Copy = Gui:Clone()--Tagged as Copy
                FoundCopy = Player.PlayerGui:FindFirstChild(Copy)--Doesn't won't work because it's not a string

while wait() do
    for _,Player in pairs( game.Players:GetChildren() ) do
        -------------------------------------------------------
        local Part = script.Parent
        local Character = Player.Character
        local Distance = (Character.Torso.Position - Part.Position).magnitude
        ------------------------------------------------------- 
        print(Distance)
        if Distance < 4 then
            for _,Gui in pairs (Part.GuiFolder:GetChildren())do
                Copy = Gui:Clone()
                FoundCopy = Player.PlayerGui:FindFirstChild(Copy.Name)---Finds the Gui named "ScreenGui"
                if not FoundCopy then---Checks if the player doesn't have the gui
                    Copy.Parent = Player.PlayerGui
                end
            end
        end
    end
end