Here is some help with finding GOG corporate headquarters :
1) Since you are already in Poland, look at the sky for dark red clouds and head towards them. When they are nearly overhead ask the locals how to get to GOG. They may hesitate but be persistent. When the road ends, take the path. Follow it till you come to the GOG front gate (see image one). You will need edged weapons made of silver or silver bullets as security is very heavy here. DO NOT TOUCH THE GEM on the gate post.
2) About five miles in, you will see the crater walls. Search along the stream for the door that opens to the crater wall caves. (see image two). To open the door, it may be necessary to utter the correct words, look for clues. On the door It says swords are required but I suggest axes and crossbows. Bring torches as you will need them.
3) After making it through crater wall caves you will find your self inside the crater. GOG corporate headquarters is inside the rock formation at the crater center. (see image three). Study the entrance before you make your move. Security is very heavy so it may take you a while to battle your way down to the HR Department that is rumored to be on the fifth level. Many types of security guards so be ready to show your credentials. Watch for booby traps especially on the first three levels.
4) Once you reach the bottom level, look for the HR Department (see image four). Should be easy to get to the door as there is not that much security down there. The doors all look the same but the department should be clearly marked over the door. Ignore the screams and howls as they are just for effect.
GOG LUCK !! Hope this helps . . . =)