I was called "gay" by many people growing up. Even when I tried to put up my masculine facade, those who knew me before told me that they could see right through it.
When I finally came out, my friends' parents unanimously "knew" I'd come out sometime, as either gay or transsexual - they had suspected it ever since they knew me.
I think the most affirming moment was when I came out to my mom. I was so frightened what she would think as she had caught me dressing as a young child and often corrected my gender-inappropriate (overtly feminine) behavior. When I came out to her, she hugged me and told me, "I always knew... I always knew. I will miss my son, but I always knew I had a daughter." I wish she were still alive; I miss her even more now.