As of now, Adlink no longer sells advertising space across GSN on cable services in Los Angeles, by ALL indications. All references to the network have been dropped from the site, except these last couple of remaining, HIDDEN, listings pages. In addition to GSN, Adlink dropped OLN (Outdoor Life Network) as well as a third network I honestly do not remember, and began selling ads across Lifetime Movie Network, Hallmark Channel, and Oxygen.
Explanation 1: GSN's overall households and demographics' relative stagnation, combined with the growth exhibited by the three newbies to the site, probably lent to it's axing
Explanation 2: An agreement at some point in the process failed to go through, resulting in the dropping of the three.
FWIW, in the three years that I've viewed the listings on the Adlink service, this is the first time I've seen networks actually dropped in favor of other networks.