I work on the same GAPAN committee as those who run the GAPAN aptitude tests and have had a good insight into their methods.
If you have scored well, you can rest assured that you will probably be very successful in your future civil aviation career. There is excellent correlation between GAPAN and Morrisby tests; the parameters assessed for the RAF differ somewhat from those assessed for GAPAN due to the different personal qualities needed. But a good result is definitely that; GAPAN's skill in identifying future airlline prospects is held in high esteem by the airlines - and even though people might have paid a fair amount of dosh to attend, if their performance was weak they would have been debriefed accordingly!
My heartiest congratulations to all of you who achieved high scores - you have the right stuff for the airlines!!