ok i did some research for you on gibberellic acid and it turns out that most people use this acid on females to make them males to they can breed and have 100% female seeds so thats a bummer... but there are many cases that people did use it to make males into females so what you need to do is to take a clone and grow it and then add a little bit of the acid with water at the early stage of flowering. when you google it type in "gibberellic acid male marijuana" and a list of things pop up for it so good luck and let us know how it goes...