when you type GK into wikipedia, one of the options is this...
Geilenkirchen (German pronunciation: [ˈɡaɪlənkɪʁçən]) is a town in the district Heinsberg, in North Rhine-Westphalia, Germany. It is situated near the border with the Netherlands, on the river Wurm, approx. 15 km north-east of Heerlen and 20 km north of Aachen.
The town gives its name to nearby NATO Air Base Geilenkirchen.
The base is home to 17 E-3A Airborne Warning and Control (AWAC) aircraft manned by crews from 14 nations
Just thought that it was interesting that GK links you to a air base :)
