The Gordon Center's website said the show runs from March 24 through June 24, 2009. I thought I might actually have time to go this weekend. Since the website didn't say what the gallery hours are, I called to find out.
It turns out that the gallery is not actually open to the public. It is only there for people who go to see performances in their theatre. And the last performance of their season was on March 29th. They did, apparently, have some public events, but they don't have any more planned.
I hope they are paying Ms. Roy well for hiding her photographs.