The infamous Resolución 99 didn't get passed. The goals of it were to restrict all marriage to unions between a man and a woman... you know, the usual. Here is Gay.com's article.
On the other hand, according to El Vocero there is a great possibility of it returning very soon in the coming years. Jorge de Castro Font seems determined to bring it back. We'll see if he's saying that mostly to get reelected or if it'll really happen.
The Resolution drew a lot of attention a few months ago with large protests in Old San Juan against it.