The Fort Goks Military base is a building exclusive to Fort Goks. To enter, you must first receive a special pass. Inside, there are two buildings. Colonel Kaminski's Office, and the MRM-12-R Operator's Console.
You may recieve the pass from Oswald Raff for free as part of a quest to help him gain control of the region or from Pierre Seton for 100000(or 80000 if you are a good negotiator).