Unfortunately, the poor are ALWAYS at a systematic disadvantage in society. Doesn't matter the country. Doesn't matter the collection of people (black, white, gay, straight, Jewish, Muslim).
The inherent problem is that poor people, by definition, have very little power financially. Poor people tend to have, relatively, little power socially (social mobility). Poor people on the face of things have an equal vote in most countries, but this is often not the case, in fact, because while a lawyer can take off an hour to vote during the middle of Tuesday, most McDonald's and Taco Bell workers do not have the knowledge to know it's their right to request that time off (and its the law the business must provide sufficient time) nor would they dare jeopardize their job and what little financial security they have to cast a "worthless" vote you'll often hear them say.
Sure, a very few poor people are poor by choice. Either altruism in giving all their money away, or for philosophical reasons. But the vast majority of poor people are poor because they're "unfit" (I do not mean to cast a moral judgement) to "succeed" in our society. They're strapped with taking care of kids. They're addicted to drugs. They have undiagnosed or diagnosed but untreated psychological problems. They have schizophrenia. They have no political connections. They don't know anyone on the City Council. They don't know lawyers. They don't know doctors. They don't know the new "hot" stock option. They're even further debt because after their check bounced, the bank charged them a fee for it bouncing.
The cycle is clear and sad. And it's usually not their "fault" in any kind of a moral or judgmental sense. It's usually just unfortunate circumstances (e.g., being born with an IQ of 80, being born with a genetic propensity to become addicted, being born without parents who instilled the importance of completing-at the very least-high school, etc.). No institution has ever had a "preferrential option for the poor." Christ's teachings did and do, he preferred the poor in an affirmative sense, but the Catholic Church, despite its extensive social justice teachings, has overall failed to deliver on its preferrential option for the poor (I say this as a Catholic who admits the Catholic Church is one of the most considerate and compassionate institutions towards the poor).
So have gays? Yes. As have every other group. Sad but true.