quick question If Alpha is 0 is the GUI rendered

I have just managed to make a GUI fade in and fade out.

What I wanted to know is whether or not any extra processing power is used if the alpha is zero but the GUI is still active?

Just wanted to know in case it’s a good idea to optimize more by making the GUI false altogether after it’s alpha is at 0?

Yes. If you are concerned about performance it is better to disable the entire GUI entity itself (Source).