Personally I am not the "G" in LGBTQ+ but I prefer to be described as gay than queer, because in many parts of the world where I lived or visited, queer is still a slur and carries a lot of emotional baggage with it. I don't think it's problematic for a modern website to choose to use gay as the catch-all. Really how people choose to be referred to is just a matter of personal preference, it's not nearly as important as actions or intent. If the site is legit, people will appreciate it all the same.