Hello all!
I decided that we don't really need official GS institution.
To fill that hole I developed simple 'Praise' system.
How does it work?
1. Each helper can create own personal thread where players can post their praises. Introduce youself with induction/referral in first post.
2. Be helpfull, answer newbie questions, help with quests etc...
3. Ask (don't demand!) person you have helped to describe this situation in your personal Praise thread.
From time to time I will review this section and grant some GJ rewards for helpers.