Yes, please do explain that. What you said makes no sense. ANYTHING
connected to the equipment which is plugged into that GFI is
protected, unless something in the system is plugged into a non-GFI
outlet. As long as the amplifier, mixer board, and any other
accessories are plugged into a GFI, anyone touching anything connected
to it is protected, whether that be a microphone, guitar, speaker
plug, cd player, or anything else. It's the same thing as plugging in
your power saw, drill, and an electric toaster into the same GFI.
They are all protected. The only problem that could occur is if
someone made an error when setting up the equipment and plugged some
item such as a non-gfi outlet, such as a separate guitar amp. If the
facility has ALL GFI outlets, then there is no reason there will be
any errors in connecting the stuff.

Technically what you say is true...but if you are the AWIC and the
saftey of these people ankle deep in water were YOUR responsibility,
what would you do?

Mark