Call a plumber or a gas contractor, I would imagine if you are getting
water in your gasline you have a pretty serious problem. Doesn't the
smell of all that gas leaking scare you a little. I know it would
scare the hell out of me, I mean if you just had a little pinhole type
leak or a leaking joint on the piping you would smell it, but if you
have enough of a leak to acutually allow water to get into the pipe
you must have on whopping big hole. Don't screw around get a liscenced
gasfitter to repair it.