A hopeful, if small, sign of change.
The situation in your country reminds me of the UK in the 1990s. Up to that point, the Conservative party was strongly against any equal rights. Labour was more sympathetic but out of office until 1997. Indeed, under Thatcher, the Tories had legislated anti-gay measures in the `80s like Section 28 (of a local government bill), criminalizing the 'promotion of homosexuality' by any one employed by said government. Whether they intended for someone to be actually prosecuted/convicted for this crime is debatable, it certainly had a chilling effect on openly talking about such issues.
But in the early/mid-`90s and onwards, one or two conservatives began to speak out against their party`s line on such rights; Edwina Currie for one.
New Labour took this further by lifting the ban on gays in the military in 2000, and with civil partnerships in 2005.
Now we have a Conservative-Liberal Democrat government proposing gay marriage by 2015!
How things change, just when they seem they never can!
A defeat in the presidential election this November may accelerate this process of progressive Republicans speaking out like above. It certainly worked for the Conservatives here!