ALBANY - More than half of voters now back same-sex marriage, according to a poll released Tuesday. Fifty-one percent of those surveyed by Quinnipiac University support civil marriage between two men or two women. That's an increase of 5 percentage points since last month when voters were deadlocked, 46 percent to 46 percent. In this month's poll, 41 percent opposed gay marriage and 8 percent were undecided. The results come as Gov. David A. Paterson put the issue on today's agenda for a special session of the State Senate. However, it remains unclear whether there are the 32 votes required for adoption. On May 12, the Assembly passed the measure. "It's the slimmest of majorities, but for the first time . . . same-sex marriage is ahead," said Quinnipiac pollster Maurice Carroll. Support for gay marriage was strongest among women, Democrats, Hispanics and those who don't attend religious services frequently. The opposition centered on Republicans, churchgoers and men. Quinnipiac polled 2,477 voters from June 16 to 21. The error margin was 2 percentage points.