Tween Gui ontouch part?

I don't know if it's when you hit a part in Workspace, but if it is then this works

function move(Gui)
game.StarterGui.GuiMain.Frame:TweenPosition(UDim2.new(0.001,0,0,0),"Out", "Quad", .9)
end

function onTouch(part)
move(script.Parent) 
end

game.workspace.PARTNAMEHERE.Touched:connect(onTouch)

I'm not sure if you included a listener on the .Touched event.

I think you meant:

yourPart = game.Workspace.ExamplePart;

function move(Gui)
Gui:TweenPosition(UDim2.new(0.001,0,0,0),"Out", "Quad", .9)
end
function onTouch(part)
move(script.Parent) 
end

yourPart.Touched:connect(onTouch);

Also, I would suggest putting the tweening function into a LocalScript and the touched listener into a normal script or else it might not work correctly. I would suggest allowing the normal script to call the tweening function using a remote event.