It doesn't need to mean anything. It can mean something, but it needn't to. People are randomly gay, black, handicapped, or god-forbid Muslim. They are not some kind of issues-oriented Other. Just, you know, people. It's not like they a reason not to conform to 50s' white American eteronormative standards, right? Or they do?
This. A hundred times this.
It's one thing to decide you want a gay, black, handicapped, or Muslim character in your fiction. And they should be there, to some degree. The problem is inserting that character and having their gayness, blackness, handicap, or religion be the totality of their character.
But having her be a normal person, who's trait can be remarked upon occasionally when relevant or interesting? That's what we should want out of these changes in society.