Hello , when im clicking play (gothic 1) nothing happend. Game is in task manager GOTHIC.EXE - process but it wont run
Btw i have 3 hours on gog (played this game) just because it was in process, but i never played it. Is it possible to reset that hours?

Some more information would be helpful. PC specs, OS,...
Otherwise you can always write to GOG support.

I've had this problem quite a few times myself and there are several ways to solve it. One of the first two usually works, but many people recommend the third one, because SP fixes many more things.

1) check if you have any .RPT files inside/near the Gothic folder (e.g. if you have Gothic installed in E:\Games\Gothic, check if there are any .RPTs in either E:\Games or E:\Games\Gothic) and delete them, if you find any;

2) start Gothic twice (manually, not through Galaxy) and then kill rundll32.exe in the processes;

3) install SystemPack.

I've tried all the solutions presented here, and rundll32.exe doesn't show up in my processes, and the install button on the system pack is greyed out.

rename gothic2.exe in the folder directory to gothic.exe and you should then be able to install the systempack.