- Gaal, Zoltan (1934-)
- Gaar, Reiner (1958-)
- Gaathaug, Morten (1955-)
- Gabb, William Henry (Harry) (1909-)
- Gabiola, Bernardo de (1880-1944)
- Gäbler, Ernist Friedrich (1807-1891)
- Gabler, Johann (-c1784)
- Gabriel, Richard (1874-1960)
- Gabrieli, Andrea (c1520-1586)
- Gabrieli, Giovanni (c1557-1612)
- Gabriel-Marie, Jean (1852-1949)
- Gabrielsen, Stephen (1939-)
- Gabunia, Nodar Kalistrovich (1933-2000)
- Gaccon, John Augustus (c1869-)
- Gackstatter, J. G. D.
- Gadd, Lauren (1953-)
- Gadda, Giulio (1839-1905)
- Gade, Niels Wilhelm (1817-1890)
- Gadenne, Alphonse (1865-)
- Gadsby, Henry Robert (1842-1907)
- Gadsch, Herbert (1913-)
- Gaffe, George (1849-1907)
- Gäfgen, Roland (1961-)
- Gagliano, Marco Zanobi da (1582-1643)
- Gagné, Marc (1939-)
- Gagne, Richard (1960-)
- Gagnebin, Henri (1886-1977)
- Gagneux, Renaud (1947-)
- Gagnier, Capt. Jean Josephat (1885-1949)
- Gagnier, Joseph
- Gagnon, Alphonse Alain (1938-)
- Gagnon, Charles Edouard Gustave Henri (1887-1961)
- Gagnon, Gustave Adolphe Mathurin (1842-1930)
- Gahér, Jozef (1934-)
- Gaide, Paul (1858-)
- Gaines, Samuel Richards (1869-)
- Gajda, Robert (1890-1952)
- Gál, Dr Hans (1890-1987)
- Galán Bueno, B. Carlos Pablo (1963-)
- Galard, Jean (1949-)
- Galbraith, J. Lamont (1870-1930)
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- Gale, Clement Rowland (1862-1934)
- Gale, John James (1872-)
- Gale, Walter C. (1871-1928)
- Galema, Ate (1950-)
- Galeotti, César (1872-1929)
- Gales, Weston (1877-1939)
- Galetar, Charles (1943-)
- Galilei, Vincenzo (c1520-1591)
- Galimberti, Giuseppe (1851-1909)
- Galindo Dimas, Blas (1910-1993)
- Gallais de Chateaucroc, Claude (1949-)
- Gallego, Miguel del (1938-)
- Gallerano, Leandro
- Galli, Carlo
- Galliard, Johann Ernst (c1687-1749)
- Galliera, Arnaldo (1871-1934)
- Gallignani, Giuseppe (1851-1923)
- Gallisay, Priamo (1853-1930)
- Gallon, Noël (1891-1966)
- Galloni, Giovanni Prospero (1811-1896)
- Galloway, Charles H. (1871-1931)
- Galloway, George (1917-)
- Gallup, Emery
- Galpin, Canon Francis William (1858-)
- Galpin, William (1885-)
- Galway, Richard
- Galway, Dr Victor Edward (1894-1960)
- Gamarra, Manuel de (1723-1791)
- Gambau, Vincent (1914-)
- Gambini, Carlo Andrea (1819-1865)
- Game, Aalbert Edward (1902-)
- Gammon, Annie
- Gange, Kenneth Edward (1939-)
- Gangfløt, Sørens (1921-1997)
- Ganne, Louis Gaston (1862-1923)
- Gansloser, Karl Ludwig (1849-)
- Gansz, George Lewis (1924-)
- Gant, Andrew (1963-)
- Gant, Marjorie Vera (1906-)
- Gantner, Albert (1916-1983)
- Ganz, Wilhelm (1833-)
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Organist 
Organist & composer 
Composer 
Organ builder 
Other
