[there’s a knock at the front door]
LORELAI: Oh, that must be Pauline Kael rising from the dead.
Pauline Kael (1919-2001), film critic who wrote for The New Yorker magazine from 1968 to 1991. One of the most influential film critics of her era, she was known for her witty, biting, opinionated reviews which often ran counter to those of her contemporaries, and were highly personal.
Pauline Kael had only died the previous year to this episode, so Lorelai is saying that Pauline Kael must be rising from the dead to sharply critique the films that Taylor has offered her.