The answer to the question is a somewhat convoluted one: in a strict sense, you will not lose any of the retained glycogen and subsequent muscle synthesized a result of AP; however, upon cessation you will most likely return to your Pre-AP level of Insulin Sensitivity.
Such sensitivity is one of the most effective and dynamic aspects of the product - accumulative use presents cumulative progress, as the factors involved (GLUT4 translocation, carbohydrate ingestion) are not necessarily rate-limited.
In the most simple form: no, you will not lose your made gains. You will, though, return to normal, so to speak.