I was a little lucky on my PFL during the PPL GFT. My instructor, who happened to be the chief flying instructor and staff examiner, pointed to a field and made sure I was looking at the right one, then reduced the throttle to idle and said "oh dear it looks like you have an engine failure". I've never been very good with PFL's at the best of times.
Passed on the first attempt and I didn't even know I was doing the GFT, I thought it was a practice session before going for the GFT. Having the examiner as my instructor helped somewhat to ease the nerves.
Shame you aren't allowed to be trained by the same guy who is going to examine you under the new rules.
The most important thing is that you're safe. Basically the examiner is just ensuring that he or she would be happy to let their children, spouse, friends, family etc fly with you in the left hand seat as P1.
All the best.
Charlie Zulu.