I dnt know abt the Gen Rani of Pervez Mushrraf but i know where the term "Gen Rani" comes from.
It comes form Gen Yahya Khan's mistress named Rani. Gen Yahya khan did alot of things what Rani said and was very fond of her,
"Gen Rani" represents a Tawaif like character, who influences Dictators (generals) for her motives.
I am confused too, Who was Gen. Musharraf's Rani ???