I have yet to find any Gargoyles and I'm on my second playthrough. I went to the Soulflayer Canyon and I didn't see any Gargoyles at time and I believe I cover all floors of it, I even got the Fifth Journal Entry, and find that Ledge part of the Canyon floor but nothing was there.
I haven't see one even at night and I don't know which Chamber in the Everfall during Post-Game you can find them as I never found a single one. I need to farm some of the items it drops.
Does anyone know when and where can I find these Gargoyles? I would like to know.
"Invoke... VIRUS SOUL!!!" ~ From my Virakins global manga project Official Husband of Caster of the Fate/Extra boards
I'm not sure about Soulflayer Canyon, but I've found Gargoyles in the area around Gran Soren in the post-game during daytime. They were perched up on the stone construct at the points overlooking the road.