I made a GUI, and I don't want it to come up when I reset?!?

Have the GUI put into the PlayerGui once the player has been added to the game, but don't add it whenever the character respawns. You can do this by utilizing the PlayerAdded event, like so:

game.Players.PlayerAdded:connect(function(Player)
    local GUI = script.GUI:Clone()
    GUI.Parent = Player.PlayerGui
end)

This event only fires once a player has been added to the game, so it will only fire once for each player. Meaning that the GUI will only show up once. Hope this helped!