g2 and g will change to the same class in quebec. maybe class 5. and it is quite easy. so i feel quite happy when i changed my license. but my friend who has g license feel a little unfair.
i changed mine in montreal. I visited SAAQ and they gave me an address then I changed there. so, it depends where you are living. I have a classmate who also changed his license in Hull. (from G2 too). just go there with your old driver's license and lease and sin card and .... (you can make a call to SAAQ for documents because i have a bad memory. )