"Grey's Anatomy" actress Chandra Wilson is to guest star on the upstate New York-set soap opera "General Hospital," TVGuide.com reported. Both medical-themed dramas air on ABC. "The two shows are on the same lot in Los Angeles shooting right next to each other," Wilson told the television news website. "We've been neighbors for years and we've talked forever about trying to do this and at last it worked it out. Of course, I finally had to say to 'GH:' 'Look, just tell me when you want me and I will be there. I'll tell "Grey's Anatomy" I'm not available!' I'm a serious 'GH' fan." Wilson went on to say she has been watching the show for 35 years. "I'm such an impossible groupie that I stay away from the studio commissary from 12:45 to 1:45 p.m. because I might run into the 'GH' stars having their lunch, and then I'd be saying stupid stuff and tripping all over myself," she laughed. "It's been that way for 10 years!"