Lady Gaga is still haunted by persistent rumors she is secretly a man, RadarOnline.com can reveal. The Poker Face singer, 38, admitted she’s never been able to shake off speculation surrounding her gender, which has followed the star throughout her career. And Gaga — real name Stefani Germanotta — believes the misinformation was allowed to continue because she’s historically refused to shut down questions concerning it. Gaga said: “When I was in my early 20s there was a rumor that I was a man. “I went all over the world. I travelled for tours and for promoting my records and almost every inter…