[X] Piety: They say that suffering builds character, and you can't think of a more character-building activity for your son than placing him at the head of the Council of Faiths. In all seriousness though, with the growing prominence and importance of religion in the Empire, having your son in a place to learn about and influence the numerous faiths in Gryphus may be a wise decision.
[X] Martial: Gawain shall be given a commission and a position of authority within the military. Exactly what role he will play is as of yet uncertain, but your military command could always use another effective leader to carry out operations, both logistical and combative in nature.
[X] Intrigue: When you began your rule, you had no idea just how important your spies and intelligence agents would become to the security and functioning of your domain. If Gawain is to one day become an effective ruler, he must have first-hand experience with the Empire's...less obvious means of influencing events.
[X] Stewardship: While he does not have the business instinct borne of years of experience that you do, Gawain still has a head for sums and an eye for opportunity. Besides, the whole point of this exercise is to give him a chance to learn and grow.