GENEVA — Katy Goodrich is straight. But finding out four years ago that her brother is not was enough to prompt her to do whatever she could to support the gay movement. “I’m sure he would do it for me, too,” said the William Smith College sophomore who organized a same-sex holding hands day Thursday at the Colleges. Goodrich, who chairs the campus’ PRIDE Alliance (People Respecting Individual Differences in Everyone), said the event was meant to show people of all sexual orientations that their peers accept them for who they are. Like Goodrich, most of the 20 or 30...