How do i make a script so when the part is gone with a pickaxe a gui will show up?

Well, are you new to LUA? You've made some mistakes, but don't worry, they are easy to fix.

Try this code, if it doesn't work, tell me output.

-- remember to make a variable of Sparkerald
Sparkerald = game.Workspace:findFirstChild("Sparkerald")

function Dissappear()
if Sparkerald == nil then -- Sparkerald is the name of the model
    print("Nil!")
   -- replace Workspace with StarterGui if it's in StarterGui or whatever else.
    game.Workspace:FindFirstChild("Sparkeraldgui").Parent = game.StarterGui.Sparkeraldgui --Sparkerald gui is the name of the gui
game.StarterGui.Sparkeraldgui.TextLabel.Visible = true --We can now do this scince we have activated the textlabel of sparkeraldgui
print("Visible!")
wait(3)
    game.StarterGui.Sparkeraldgui.TextLabel.Visible = false
   end
end
script.Parent.Destroyed:connect(Dissappear)
print("Connected!")

Try this above ^ | Hope this helps! Thanks, marcoantoniosantos3