Every fan service trick in the book (except female attributes) went into this one. It's so high energy, so confusing, but who cares, it's all the same boy/girl/conflict plot. Maybe I need to rewatch the GPS episodes so far, but really, it's a wild mess of action, with no clear: chain of command, plot, setting, bad guys.. plot.
Again, it's awfully fast paced with little IRL context, but it's a huge and successful parody of anime in general. Great VAing and animation, all around :)