I need to put together a plan for wiring a Hot Springs Grandee model GG. I dont have the 20a 30a panel that was supplied by the manufacturer and need to put one together. My question is this, if I buy a 50a 2 pole main GFCI breaker to feed the subpanel do the 30a and 20a 2 pole breakers need to be GFCI also? Thanks for the help.