When you hover over someone, I want a gui to pop up. How can i do this?

Heres what I tried ~~~~~~~~~~~~~~~~~ local Mouse = game.Players.LocalPlayer:GetMouse() Mouse.Moved:connect(function()

if Mouse.Target.Parent:FindFirstChild('Humanoid') then
    end

end

The first Problem is that Moved is not a function of the mouse, Move is. Secondly, I don't recommend looking for the humanoid, because this could include NPCs. Check to see if Mouse.Target.Name is able to be found in game.Players

But you can't stop there. The mouse never actually hovers over the model, it hovers over the players body parts (ex LeftArm, RightLeg) so we solve that by doing Mouse.Target.Parent.Name

Here is your finalized script.

local Mouse = game.Players.LocalPlayer:GetMouse()

Mouse.Move:connect(function()
	if Mouse.Target ~= nil then --Check to make sure Mouse is not pointing at the sky
		if game.Players:FindFirstChild(Mouse.Target.Parent.Name) then --Key Line
			print('Found Player: '..Mouse.Target.Parent.Name)
		end		
	end
end)