2 answers
Go to Starter Gui, right click and press "Insert Basic Object" Then Press ScreenGUI and Insert it. Then do the right click again and add a text Box or button or label. Its a little complicated so look for tutorials on youtube. :) I had the same problem as you. But if you look at my game its fully fledged!
This question is really broad, and cannot simply be answered in a short matter. For instance, there are different types of GUI's: Screen GUI's, Surface GUI's, etc.
I advise you to read the wiki about GUI's here.
If you're asking how to insert GUI's and scripts into your place, go into Studio, click on View < Basic Objects, and you'll be able to see all the objects you are able to insert.
If you're a total beginner at scripting, read the wiki as well. Beginner's tutorial
Closed as Too Broad by AmericanStripes
This question has been closed because it is too broad and is generally unanswerable. Please ask a more specific question.
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