From Starbounder - Starbound Wiki
Gnome is an object unobtainable by players through normal means. This item's information is present in the game files, but not intended by developers to be in players' possession.
Gnome is a crafting material associated with Mini Village mini biomes. It is in the game, but you must use the /spawnitem command to spawn it.
- Rampaging Koala: Added to game files