SOOKIE: But I mentioned it once, it’s his [Jackson’s] turn.
LORELAI: Alright, let’s say it is his turn. You can spend a lot of time sitting around waiting for him to realise it’s his turn, or you can just run with the wolves and make it your turn again.
Lorelai is referring to the 1992 best-seller Women Who Run with the Wolves: Myths and Stories of the Wild Woman Archetype by Jungian analyst, author, and poet Clarissa Pinkola Estés. The book analyses myths, fairy tales, and folk tales from different cultures to discover the Wild Woman archetype of the feminine psyche, in line with Jungian psychoanalysis.
The book spent three years on the New York Times Best Seller list, a record at the time, and the author won an award for being the first Latina author to make the Best Seller List. It was a highly popular feminist book of the 1990s, so Lorelai is encouraging Sookie to take the initiative and ask Jackson out without worrying about traditional gender roles.
The Annotated Gilmore Girls 