Getting the title of 'Silver Knight' was all about skill. But, the same couldn't be said about getting the 'Golden Knight' title. Being a golden knight was not all about strength.
Those who want to become a golden knight must be a silver knight first. Afterwards, they have to obtain as many achievements as possible. The more merit you have, the more you would be considered for the position. Then, comes the hardest part, that was, to be recommended by a knight commander and gain the approval of all five of them.
There was also the additional rule that there can only be 50 golden knights among all the seven kingdoms.
With Sir Bagdemagus's untimely death last year and the retirement of another knight, two seats were now open, hence the appointment of Sir Percival and Sir Maleagant.