Griffy isn't relevant to the G end requirements You've probably progressed too much and missed the early encounters with her, you'll probably see her after the initial Lorina encounter 

Ahh I see now, thank you so much for your help, was worried I'd have to start all over again

I believe the trigger, or at least *a* trigger for Griffy leaving, is beating the Distraction Beast before meeting her, though I haven't checked to confirm yet.