I do not know if this has been pointed out before but there are two lanuncher for NWN2 with the gog version. The one they supply on install is for the complete version and deos not have the link to the toolset. If you go into the NWN2 directory you will find a file called NWN2Launcher that you can place on your desktop as a shortcut. In has a button to start the toolset on it. I guess they did not want to use this launcher because it has an update button which is no good for the gog version.

Of course you can just create a shotcut to the toolset by going to the NWN2 directory ( Not the directory under documents that is for game configiruation but the other main NWN2 directory were the executables are located). It is named NWN2ToolsetLauncher.

By the way when using the toolset you use the directory found under the Documents folder for your files and work. The other main directory holds the NWN2 game modules and you don't want to change any of them. I have created a few modules and it is really fun but learning the toolset can be a little hard if you have never worked with one before. There are some really good community made toolset guides you can download and one also included under the help button in the toolset itself.