It would not. GPL:ed software does not care about the license of the hardware it runs on.
If it did, Dell and Lenovo would have to release the schematics and board files of their offerings running Linux out of the box :)
Edy555 also released the schematics under a permissive license, but the pcb artwork was not released. Hugens NanoVNA-G is their original pcb artwork, even if it is firmware compatible with the original NanoVNA.
Similarily thus NanoVNA 3ghz/SAA/v2 is original artwork.
Only thing in common with other NanoVNA's is the name and firmware compability.
Ismo V??n?nen OH2FTG