GAPAN is only £175 and if the examiner says "Hmmm, ohhhh, haaa, hmmm" while scratching his head at your results, you're only £175 down.
From what I could gather from chatting to those that attended my GAPAN tests day was that anyone who didn't pass was still fully intending to train anyway.
Not sure how valuable the tests are if you don't believe in the result.
Personally i'm fully in favour of the tests and thought it was a thoroughly worthwhile day, but I find it hard to believe many will give up a dream because they fail the tests. I know i would have found it very hard to give it all up if i had failied. One guy was almost in tears when he came out of the debrief having been told his score fell in the "Training Risk" category. He vowed to carry on regardless.
The medical on the other hand is an absolute show stopper so I’d always say get that one sorted first.
Good luck.