Former House Speaker Newt Gingrich will headline a Log Cabin Republicans event next month.

According to its website, Log Cabin Republicans “is the nation's original and largest organization representing gay conservatives and allies who support fairness, freedom and equality for all Americans.”

Gingrich will be the headline speaker at the group's 2016 Spirit of Lincoln event taking place on Wednesday, September 28 at the Grand Hyatt hotel in the District of Columbia.

Gingrich, who was in the running to be Donald Trump's GOP running mate, has a long history of opposition to LGBT rights. In late 2012, Gingrich called for a GOP reality check on marriage equality, but fell short of offering an endorsement of such unions.

“The momentum is clearly now in the direction in finding some way to … accommodate and deal with reality. And the reality is going to be that in a number of American states – and it will be more after 2014 – gay relationships will be legal, period,” he told The Huffington Post.

But it was under Gingrich's leadership that the House approved the Defense of Marriage Act (DOMA), a law which prohibited federal agencies from recognizing the legal marriages of gay and lesbian couples. The Supreme Court struck down DOMA in 2013. The ruling is widely credited with opening the door to nationwide marriage equality two years later.

During his 2012 presidential run, Gingrich supported a constitutional amendment which would prohibit same-sex marriage nationwide.

I think there is a gay and secular fascism in this country that wants to impose its will on the rest of us, is prepared to use violence, is prepared to use harassment,” the thrice-married Gingrich said during a 2008 Fox News interview with Bill O'Reilly. “I think it is a very dangerous threat to anybody who believes in traditional marriage.”