I've done some searching on this topic and from what I could get my hands of this topic and found out of all the polls I've found that discuss the gender issues, more women supported gay marriage then men do.
From this article:
http://chronicle.com/article/College-Freshmen-Approve-of/64685/The Higher Education Research Institute also broke down freshmen's support for same-sex marriage by sex, race, and religious affiliation. Women were 72 percent supportive and men 57 percent supportive, compared with national rates of 43 percent for women and 34 percent for men, according to the Pew survey.
