Andy Lang reports  on the United Churches of Christ Website that Rev. William R. Johnson became the first openly gay man ordained to Christian ministry.  This was in the United Church of Christ.

Since then ordination of openly gay people has been permitted in some  25 other churches. I quote from his article at length:

Europe heads the list with 19 churches where homosexuals can be legally ordained. But several denominations in Africa, North America and the Pacific are also joining the trend, including the Anglican church in South Africa formerly led by Archbishop Desmond Tutu, the United Church of Canada, the Episcopal Church in the U.S. and the Uniting Church in Australia.

Besides these Protestant and Anglican churches, at least three of Europe's "Old Catholic" churches permit the ordination of gays and lesbians. These are churches in the Roman Catholic tradition that broke with the Vatican in the 19th century.

Many churches have adopted uniform policies that expressly permit homosexuals to serve as priests or ministers. In others, the policy is either neutral or implicit, leaving the decision to a regional or local authority.

Churches where homosexuals can legally be ordained Anglican: Church of the Province of Southern Africa*, Episcopal Church (USA)*, Scottish Episcopal Church*; Baptist: Alliance of Baptists (USA)*; Christian: Christian Church (Disciples of Christ)*; Lutheran: Church of Denmark*, Church of Norway, Church of Sweden*, Evangelical Church of the Augsburg Confession (Austria), Evangelical Lutheran Church of Finland*, Evangelical Lutheran Church in the Kingdom of the Netherlands, United Evangelical Lutheran Church of Germany*; Old Catholic: Old Catholic Church of Austria, Old Catholic Church in the Netherlands*, Old Catholic Diocese of Germany*; Reformed and United: Evangelical Church of the Helvetic Confession (Austria), Evangelical Church of the Union (Germany)*, Evangelical Reformed Church (Germany)*, Evangelical Reformed Churches of Switzerland*, Evangelical Waldensian Church (Italy)*, Netherlands Reformed Church, Reformed Churches in the Netherlands, Remonstrant Brotherhood (Netherlands), Uniting Church in Australia*, United Church of Canada, United Church of Christ (USA)*, United Protestant Church of Belgium* 

* These churches have no explicit churchwide policy permitting or prohibiting ordination of gays and lesbians. The decision is left to regional or local bodies, some of which are willing to ordain homosexual candidates. In some churches this amounts to a churchwide practice, since no ordaining bodies discriminate against homosexual candidates for ministry. In Germany, a majority of Lutheran, United and Reformed Landeskirchen (regional churches) permit the ordination of homosexuals without requiring celibacy. In the United Protestant Church in Belgium, homosexuals generally can be ordained in Dutch, but not in French, congregations. The General Synod of the Church of Norway, voted in 1997 to oppose the ordination of homosexuals living with a partner, but four of the eleven Norwegian bishops have declared that this policy is not binding in their dioceses. The issue is still in dispute. There is no churchwide policy in the Evangelical Lutheran Church of Finland, and at least one bishop has declared his willingness to ordain homosexuals. Other Finnish bishops have said they will do so only if the ordinand commits to lifelong celibacy.