How the standard is versioned, and how its neutrality is kept structural rather than promised.
The spec, suite, and corpus are open source under MIT — that is how a standard earns adoption and trust. The reference store is tested by the same suite as every other backend — no implementation is privileged.
Every capability moves through four stages — proposed (RFC), draft (experimental + tests), stable (API locked), and frozen (immutable). All ten capabilities in v0.2 are frozen: their interface and conformance tests will not change.
Proposals, discussion, and revisions happen publicly. GMP is currently stewarded by the GNS Foundation; as external implementations adopt it, governance opens to implementers.