According to this wikipedia entry for "War of the Green Lanterns" it was published March 2011- August 2011...which as I said in my previous post, was the last major GL arc that took place in the pre-New 52 DCU.
Now I haven't been reading GL during the New 52 but wasn't this meant to be set up for "Green Lantern" and the whole pairing with Sinestro?
As for the timeline...all of GL's continuity was carried over into the New 52...but Rao if I know where it is all supposed to fit over the five years or what not.
Yes, GL #1 starts off after the war with Hal living on earth without his ring and Sinestro going to him for help. Thus far, Hal has only had a pseudo ring that was created for him by Sinestro, but I have only read up to issue #16.