I tried doing it with this:
game.StarterGui.ScreenGui.TextLabel.Visible = false
Didn't work. I tried doing things more extremely.
Then I resorted to this.
And it still didn't work. Please send help.
If you're using a Local Script, "which you should be", then get the Local Player and then you can do the rest rather easy.
--Local Script local plr = game.Players.LocalPlayer plr.PlayerGui.ScreenGui.TextLabel.Visible = false