GNH data can be collected either in tax returns or in elections, so citizens can "vote" on which issues are most crucial to their lives. Release the data in the same way census data is published.
Use the following set of nine basic needs for healthy human brains (these needs make up Maslow's Hierarchy of Needs).
...
Sample survey:
How fully are you/your family's needs being met for the following? (low, medium, high)
Inputs - access to:
Nutritious Food (fresh, whole, healthy)
Clean Water
Fresh Air
Comfortable Warmth (including shelter)
Inspiring Light (sunlight and artificial)
Outputs - freedom to express oneself:
Physical (human waste and movement)
Emotional (personal connection and art)
Intellectual (outlets for sharing ideas)
Philosophical (outlets for sharing beliefs/questions)