During times of peace and renaissance a gentleman might earn respect among his peers and a place with a noble order through his wit and drive instead of his steady swordarm. A gentleman Knight nevertheless upholds his code and duties with the same zeal that the cavaliers of old did.
Challenge(Ex): A gentleman Knight may expend a point of inspiration to use the cavalier's challenge ability as a cavalier of his level. This ability replaces trapfinding and all instances of trap sense.
Order(Ex): A gentleman Knight gains an order at second level as a cavalier would. He must adhere to the edicts of his order and gains all the abilities that a cavalier would from the order. This replaces Poison Lore, all instances of poison resistance and poison immunity.
Is Challenge still limited in times per day?
I like the overall idea of a more combat focused Investigator (I want my Geralt, damnit!), but this one seems to trade the worst parts of the class for some of the best parts of another class.
That's a good point, I think in retrospect it needs to be two uses of inspiration (like combat inspiration) and be limited in the number of times per day like the normal challenge ability.