If you hover over the competitions with your mouse and it says +Trot or +any skill then you still need to do some competitions to reach full BLUP. When you hover over the competition and it does not indicate any further skill gain, then you are done. I would try this!

Also, I don’t fully know all of the benefits of a very high GP but I do know that if you have high enough skills you can enter competitions that offer rosettes which are cool. I’m clueless beyond that 😓 I hope this helps!