Well nothing is set in stone and as Les says, a harder negative works better in split grade printing. That will help to negate muddy highlights from using G0. But you can always use any combination of grades if you like.
One of the reasons I want to try this is that I'm just setting up a condenser head on my Modular 70 and that means using Ilford filters. Split grade means I won't have to worry about intermediate grades or calibrating different filtration setting for different papers.