Cream puff
May I should have been a little more careful with words and used 'cover', but as I don't have a a spare $10m to self insure it ends up being the same thing.
There is no requirement to have a GFPT to operate an an aircraft with a design feature. You only have to have the endorsement signed off. I did the endorsements on the way to having the required hours to do the GFPT.
You can gain your SPL, and then go straight to a CPL and be endorsed on design features along the way without having to do a GFPT or PPL if you wish.