RottenRotz: Does anyone have idea if its possible to change name of game under thumbnail/icon in gog galaxy?
You should in theory be able to do that by editing the goggame-#######.info file and changing the "name" parameter, but it seems that Galaxy will autocorrect the displayed name if it's a game it identifies. Works fine for games not yet on GOG, will have to see if the name is stored in a second location as well.
Edit: Seems like you'll also need to modify at least one .db file in %ProgramData%\GOG.com\Galaxy\storage though Galaxy seems to have modified it again, and I didn't keep its name. I think it was the buildslist.db one.
Unsure if you need to do this if you import a folder that you've already modified the goggame-#######.info file beforehand, and do be aware that messing with the .db files can cause Galaxy to lose the list of installed games, though the files will still be there.