- God (Christianity)--History of doctrines1
- God (Islam)1
- Greece1
- Greece--Larisa1
- Greece--Thessalonikē1
- Greek literature1
- Gregorian chants--Instruction and study1
- Grossa, Dora active 16th century1
- Guatemala1
- Gulistān (Saʻdī)1
- Guzman family1
- Guzman, Alfonso Perez de, 1256-13091
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- Henry I, King of Castile, 1204-12171
- Henry II, King of Castile, 1333-13791
- Henry III, King of Castile and León, 1379-14061
- Henry V, King of England, 1387-14221