- Gregorian
- Gregory calendar
- Gregory, D.
- Gregory, D.F.
- Gregory formula
- Gregory, J.
- Gregory-Newton formula
- Gregory number
- Gregory, O.G.
- Gregory series
- Grelling, K.
- Grelling-Nelson paradox
- Grelling paradox
- Grenander, U.
- Grenz-Formel 【德文】
- grey
- grey control
- grey decision
- grey forecasting
- grey model
- grey relation
- grey system
- grey target
- grey theory
- GRG