Yeah for G end you need Red Hood bonfire small talks, Alice fragments and so on.I was referring to End G regarding the memories and rrh steps just in I actually needed to do End G all over again for DLC3. Still thanks to everyone confirming that I can just go straight to Winterbell after doing an NG+.
Honestly i never tried to enter Winterbell/H route again in a follow up cycle.
At least i doubt Toro would force you to repeat the G route everytime and its a permanent checkmarked flag once you finish G in that savefile.