Formulas
- Gudermannian function
- Gyrate rhombicosidodecahedron
- Gyrobifastigium
- Gyroelongated pentagonal bicupola
- Gyroelongated pentagonal birotunda
- Gyroelongated pentagonal cupolarotunda
- Gyroelongated pentagonal pyramid
- Gyroelongated square bicupola
- Gyroelongated square bipyramid
- Gyroelongated square pyramid
- Gyroelongated triangular bicupola
- Gyromagnetic ratio
- HSL and HSV
- Hadamard regularization
- Hadwiger conjecture (graph theory)