In my qt5 code I've included module and I would like to declare a GLUnurbsObj object but my IDE do not recognize it. Is glu.h included in QtOpenGL module?
No, glu.h is not included in the QtOpenGL module. In previous versions it was but has since been removed according to this post: http://qt-project.org/forums/viewthread/14269. You should just be able to include glu.h yourself in your code.