Place Owner Item Giving GUI, Help?

I need help making a script so that I, the owner of the game get an item when I join but I don't want anyone else getting it. Help?

P.S I'm just now starting to learn Lua and scripting so I would greatly appreciate some help, Thanks.

P.P.S I also want it to be a gui so I can give it to myself whenever I want instead of when I spawn.