Well. I have an interesting story here that I just told a friend last night, and that I may as well repeat here. I am adopted. Was, rather. By my grandparents. Both dead now, both born during the great depression.
They found out I was, supposedly, gay, at age 16, due to me not reformatting a computer before giving it away to my grandmother's first daughter. Who hated me.
She showed up at our house a few weeks later, accused me of being a faggot, raged at me endlessly for 15 minutes before my mother, her birth mother, snapped off at her, and started raging at her for DARING to call me things like that. At which point my father took my hand and walked me into the den, sat me down on the couch while the two of them kept yelling at each other.
He just asked me if I was doing anything dangerous online. I replied "No, sir." because I wasn't, they didn't raise me to be stupid, I was meeting new people, learning about myself, and having fun. He just nodded, waited till my mother had finished yelling at her daughter and the daughter stormed out of the house furiously, and told me to get the phone and order a pizza, he didn't really feel like cooking after all that.
I went into the living room where my mother was to do so, she told me to turn the TV back on, and said if she ever came back around there again saying things like that, she would throw her out herself. And then she just settled in to watch TV and have a cigarette to calm down and my dad came into the room to join her and watch TV. No cigarette, as he'd quit smoking cold turkey in high school and never looked back.
They knew I liked boys now, but they didn't care a bit. Sister hated me for it, and hated them for not caring, but that was no different from anything else.
So, yeah. A GOOD family won't give a damn if you're gay, bi, or straight, so long as you're happy and safe.