How to start a GUI on click?

How to make a GUI appear for the player after he / she clicks a part?

People on here are rude sometimes and helpful others. Yes its not a request site, but this isn't a request. It's a simple question just like any other. Lucky i'm not an expert but i think you would use function onMouseButton1Down() as the function and then change the visible property of the GUI to true when the function occurs.

Well what you could do is have the GUI is ReplicatedStorage and put a ClickDetector in the Part. Put a script in the part that clones the GUI to the players GUI when they click the part. I wont post the code as you should try this first then come back if you need further assistance we would be happy to help :)