- Gaffi, (Tommaso) Bernardo
- Galuppi, Baldassare
- Galván, Ventura
- García-Arcéluz, Félix
- García, Manuel
- Gardiner, Henry Balfour
- Gardner, John Linton
- Gasparini, Francesco
- Gastaldon, Stanislao
- Gaul, Alfred Robert
- Gaztambide, Joaquín
- Georges, Alexandre
- Gerber, Steven R.
- German, Edward
- German, Folksongs
- Gibbs, Cecil Armstrong
- Gilberté, Hallett
- Giménez, Gerónimo
- Giordani, Tommaso
- Giordano, Umberto
- Giró, Manuel
- Giuliani, Mauro Giuseppe Sergio Pantaleo
- Glanville-Hicks, Peggy
- Glinka, Mikhail Ivanovich
- Gluck, Christoph Willibald von
- Godard, Benjamin
- Goetz, Hermann Gustav
- Goldbeck, Robert
- Goltermann, Georg Eduard
- Gomes, Antônio Carlos
- Gomis, José Melchor
- Goodhart, Al M.
- Gottschalk, Eugen
- Gounod, Charles
- Graben-Hoffmann, Gustav Heinrich
- Graener, Paul
- Grainger, Percy Aldridge
- Grajal, Manuel Fernández
- Granados y Campiña, Enrique
- Greene, Maurice
- Gretchaninov, Aleksandr Tikhonovich
- Grétry, André Ernest Modeste
- Grieg, Edvard
- Griffes, Charles Tomlinson
- Gritzner, Rudolf
- Grovlez, Gabriel
- Gruber, Franz Xaver
- Grund, R.
- Grünfeld, Alfred
- Guastavino, Carlos
- Guerrero, Francisco
- Guerrero, Jacinto
- Guion, David W.
- Gurney, Ivor (Bertie)
- Gyrowetz, Adalbert
