DIY Controller GFCI

OK, just to double check with folks on here. Here is the setup 380L SD boiler that will be run with a custom pot head and sometimes 8" 10 SD plates. My question is about the heating elements. I will be using 5 elements. Two 5500w will be controlled via semi automated 11kw distillery control three 4500w (or 5500w) elements will be used to bring the boiler to temp then shut off once reached. I'm intending on using 3 DIY SD element controllers. On these controllers, i imagine each must have their own GFCI or can all of them be on a single GFCI?

I'll be meeting up with the electrician on Monday and he will tell me what i need but i don't want to go in blind if you know what i mean. Thanks