The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Garron System (6 members)
- Gas (6 members)
- Gas Dwarf (9 members)
- Gas Giant (38 members)
- Gas giant (1 member)
- Gatac Manufacture (2 members)
- Geddon System (2 members)
- Gemini (24 members)
- General Missions (79 members)
- General wiki templates (12 members)
- Genesis Starliner images (24 members)
- Genesis System (5 members)
- Genesis series (1 member)
- Geomorphology (2 members)
- Giant M-type (1 member)
- Giants Giant-M (1 member)
- Giocoso Helmet images (1 member)
- Gladiator images (6 members)
- Gladiator series (1 member)
- Gladius Images (87 members)
- Gladius Pirate images (6 members)
- Gladius Valiant Images (25 members)
- Gladius series (1 member)
- Glaive images (21 members)
- Glaive series (1 member)
- Gliese System (11 members)
- Gloves (6 members)
- Gorgon Defender Industries (12 members)
- Goss System (14 members)
- Government (1 member)
- Government Agencies (11 members)
- Governors (2 members)
- Grade A computers (1 member)
- Grade A coolers (12 members)
- Grade A mining laser (11 members)
- Grade A mining laser heads (0 members)
- Grade A power plants (17 members)
- Grade A quantum drives (7 members)
- Grade A radars (3 members)
- Grade A shield generators (12 members)
- Grade B computers (9 members)
- Grade B coolers (21 members)
- Grade B mining laser heads (0 members)
- Grade B power plants (21 members)
- Grade B quantum drives (20 members)
- Grade B radars (9 members)
- Grade B shield generators (16 members)
- Grade C computers (11 members)
- Grade C coolers (21 members)
- Grade C power plants (19 members)