I don´t know if Hitler was homosexual. At least he was married, not that this would mean he wasn´t gay...
I´d like to make corrections concerning to other points mentioned above:
Adolf Hitler was NEVER called Schicklgruber; his father Alois was born as a Schicklgruber: Alois was born out of wedlock in 1837, and got the family name of his mother´s husband in 1876, well before Adolf was born in 1889. It is not known who Adolf´s grandfather/Alois´ father was. The suspects are three men:
-a jew named Frankenberger who employed said Grandma Schicklgruber
-two brothers named Johann Georg Hiedler and Johann Nepomuk Huettler
Most historians agree that this Frankenberger was the invention of people who tried to blackmail Hitler because of his alleged jewish background. Today the Hiedler/Huettler brothers are universally assumed to be Hitler´s grandfathers. They were catholic.
On a side note: please bear in mind that judaism is a religion, not a race. Even if Hitler´s gransfather was a jew this wouldn´t make Hitler´s father a "half-jew" ("half a jew"? Which half, then?) and Hitler himself a "quarter-jew". Or have you ever heard of a "half-muslim"???
Oh and another interesting point which might shed some light some of Hitler´s, well, mental defects: his mother was very closely related to his father (first cousins?) - so closely, in fact, the pope had to approve their marriage. If I remember correctly, her maiden name was Hitler, too. This inbreeding was apparently the norm in the Hitler family.