Male vs Female GM is a matter of Male vs Female psychology. There are certain trends when it comes to gender psychology and if you average it all out, you'll find that Male and Female minds have distinct differences. Sure, there are some Females who lean farther into the "male" circle than some Males, but the statistical trend is pronounced. In general, Females are more imaginative and interconnected in the way that they think. Males, on the other hand, are more concrete and compartmentalized. Both methods have strong and weak points when it comes to GMing. Women will make more detailed, involved stories and will keep track of the better part of it. Men, on the other hand, will keep track of hard-fast rules and systems more easily. Again, keep in mind that these are general trends, not absolutes. Some Men are better at making detailed, involved stories than some Women, but most Women are better than most Men.
Another thing to consider is temperament. Are you introspective or extraverted? Are you objective, tough-minded, and systematic or are you subjective, friendly, and reactive? Are you sensory and concrete or are you intuitive and abstract? Which order do you prefer, making a decision and then looking for evidence for or against that decision, or do you look for data points first and make your decision afterwards based on analysis? Knowing your order of mental functions can help in understanding what kind of GM you'd likely be. Visit www.mypersonality.info and take their temperament quiz. I also recommend David Kiersey's 'Please Understand Me II'.