RobTop Games generally tolerates GDPS as long as they don't monetize. 1.1 is abandonware in the sense that you cannot legally purchase it anymore (Steam only sells 2.2). However, downloading a cracked 1.1 client is a grey area. Most veterans argue it falls under preservation.
By downloading a 1.1 GDPS, you aren't just playing the offline levels; you are joining a mini-community where you can upload and play custom levels created specifically with 1.1’s limited (but nostalgic) toolset. Why Download the 1.1 Private Server? 1.1 gdps download