Actually separate point here - usually under Canadian law you'd be expcted to divorce where you both habitually reside, BUT that's only my way of saying I've no idea about the divorce side, get proper advice, etc. (I have no idea whether there'd be any issue with doing it outside of Canada if both reside here - and different matter if one of you resides in Indian usually).
My above was meant only to reply to the question about PR status.