E.I.
i know nothing about jay gordons night weaning.
my son stopped nursing so much at night between 15-17 months! its not that much longer for you, and it really helped my son to be able to grow into his sleep habits on his own! he still sleeps in our room in his crib, and sometimes still sleeps in our bed with us. not often at all, but times when hes sick, or has a nightmare/night terror.
im assuming if you have a family bed, you have night nursed and just gone back to sleep? this is what worked best for me, i would just latch him on and we would all go right back to sleep. the less you can use lights, the less you talk, the easier it will be to transition back to sleep! :D
good luck. its exhausting, but i wouldnt trade one sleepless night for anything in the world!