The term Gyro refers to any Gyroscope (Space,Earth,Tied or Rate) whereas Directional Gyro is typically a Tied Gyro which is used in Aircraft for the purpose of Heading reference in DGI (Directional...
They're not fattening, but they do have a lot of sugar. If it's all you eat for dessert you'll be fine, but if you're eating a diet high in other fats and sugars, then figs (or anything else really...