The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Futurology (1 member)
- GDR propaganda posters (2 members)
- General elections (2 members)
- General strikes (2 members)
- Generals (3 members)
- Genocide (13 members)
- Genocide perpetrators (15 members)
- Geopolitics (9 members)
- German-American Forty-Eighters (1 member)
- German Democratic Republic (2 members)
- German communists (10 members)
- German philosophers (9 members)
- Germans by descent (2 members)
- Germans of Dutch descent (1 member)
- Germans of Swiss descent (1 member)
- Gig economy (3 members)
- Global north (35 members)
- Global south (62 members)
- Government of the United States of America (15 members)
- Governors of Delaware (1 member)
- Governors of Kentucky (1 member)
- Governors of Virginia (1 member)
- Graphs (0 members)
- Grenada (10 members)
- Guerilla warfare (1 member)
- Gulag (0 members)
- Hammer and sickle (1 member)
- Hashtags (1 member)
- Hawaii templates (1 member)
- Heads of government (3 members)
- Heads of state (4 members)
- Hegelianism (3 members)
- Help pages (2 members)
- Heroes of the Soviet Union (3 members)
- Hidden categories (4 members)
- Higher education (2 members)
- Historians (3 members)
- Historical maps (1 member)
- Historical materialism (5 members)
- History (13 members)
- History (essays) (0 members)
- History by country (14 members)
- History of Austria (2 members)
- History of China (14 members)
- History of Cuba (1 member)
- History of England (2 members)
- History of France (1 member)
- History of Germany (7 members)
- History of Hungary (1 member)
- History of India (4 members)