How come I don't get 4 points for opening the parachute in this version of the game?
In the first version of Leisure Suit Larry 2, there was a bug, so that people were able to get effectively an unlimited amount of points by wearing the parachute over and over again.
In the later version, this was fixed, but not really properly, it just worked by accident in Sierra's interpreter. They would have needed to change 2 scripts, but only changed one.
Anyway, this issue gets fixed by ScummVM's script patcher since 17.9.2013.
Sadly GOG uses ScummVM 1.6.0 even nowadays, which was released 9.7.2013, which is why this script patch isn't applied.
You can download either the latest official release, which is atm 1.7.0 from http://www.scummvm.org/downloads
or you can also download the latest daily build from http://buildbot.scummvm.org/builds.html
that will fix this issue.