In many Wiccan traditions, it's common to have an equal number of male and female members. This is because, among other things, it helps create an equal balance of male and female energy. However, there are an increasing number of Pagan groups founded by and geared towards gay members, and may only take initiates of one gender, rather than having a balance of male and female.
Much like other issues, you'll often find that Pagans and Wiccans are very accepting of homosexuality. That's due in no small part to the fact that a lot of Pagans and Wiccans figure it's none of their business who someone else loves. There also tends to be support of the idea that acts of love, pleasure and beauty are sacred -- no matter which adults happen to be participating.
Admittedly, some books published by Pagan authors in decades past have had a more conservative view towards gay members. That trend is changing, and at any Pagan gathering you'll probably find a higher proportion of gays and lesbians than you would in the general population.
Some Wiccan and Pagan traditions are strictly for gay members, and most accept and welcome gay, bisexual and transgender seekers side-by-side with their heterosexual peers. Many Pagan clergy people are willing to perform same-sex handfastings and commitment ceremonies.