http://en.wikipedia.org/wiki/Metropolitan_Community_Church

"MCC sees its mission being social as well as spiritual by standing up for the rights of minorities, particularly those of lesbian, gay, bisexual, and transgender people (LGBT). MCC has been a leading force in the development of Queer theology."

Most of the older Protestant denominations are deeply divided over this issue, and an individual church may be appear anywhere on the spectrum; therefore you would need to research individual congregations rather than assume anything about a grouping.