Germanotta is not bisexual.
Everyone knows she is a pathological liar and that everything in her early career was about saying whatever she thought would get her noticed.
Just see the interview where Walter's asks Gargamel if she's had a relationship with a woman - the reaction and response is very telling. Such a cheap fraud.
But you've got to feel sorry for the real bisexuals who constantly get undermined and delegitimatised by straight girls and gays using it as a transitioning label.