You can contact Gilmore Girls cast members by sending snail-mail. Address your mail as follows:
Cast Member
c/o Gilmore Girls
Warner Bros.
4000 Warner Blvd.
Building 2222
Burbank, CA 91522
But replace “Cast Memeber” with the actual cast memeber’s name. So for example:
Lauren Graham
c/o Gilmore Girls
Warner Bros.
4000 Warner Blvd.
Building 2222
Burbank, CA 91522