S03-GN: Yes
Rationale
The selected private-IPv4 underlay and local peer keys/HELLO contacts need no external address allocation for independent deployment. Public Internet reachability and its allocation requirements are separate.
Assessment method
Primary specifications and pinned-code analysis; no execution
Source context
GNUnet v0.20.x configuration
Outstanding qualification
Exercise the private-IPv4 underlay and supplied HELLO contacts without public allocation or bootstrap. No claim about public routing.