- Gadalinium metallicum (Scholten)
- Gadalinium nitricum (Scholten)
- Gadalinium oxydatum (Scholten)
- Gadalinium phosphoricum (Scholten)
- Gadalinium sulphuricum (Scholten)
- Gadolinium hydroxide (Brown)
- Gadusmorrhua (Clarke)
- Galium (Sankaran)
- Galium aparine (Clarke)
- Gallicum acidum (Clarke)
- Gallicum acidum (Le Roux)
- Gallium (Scholten)
- Gallium sulphuricum (Scholten)
- Galvanismus (Clarke)
- Gambogia (Boericke)
- Gambogia (Clarke)
- Gambogia (Nash)
- Gambogia (Phatak)
- Gaultheria procumbens (Clarke)
- Gavia immer (Jason-Aeric Huenecke)
- Gelsemium (Kent)
- Gelsemium (Allen)
- Gelsemium (Boericke)
- Gelsemium (Charette)
- Gelsemium (Clarke)
- Gelsemium (Deriker)
- Gelsemium (Farrington)
- Gelsemium (Gibson)
- Gelsemium (Grandgeorge)
- Gelsemium (Phatak)
- Gelsemium (Sankaran)
- Gelsemium (William H Burt)
- Gelsemium comp (Vogel)
- Gelsemium sempervirens (Vitko)
- Gentiana comp (Vogel)
- Gentiana cruciata (Clarke)
- Gentiana lutea (Deriker)
- Geranium maculatum (Boericke)
- Geranium macullatum (Clarke)
- Germanium (Pavol Tiben)
- Germanium (Scholten)
- Ginkgo Biloba (Stallinga)
- Ginseng (Clarke)
- Ginseng (Deriker)
- Glandulae supraren. comp (Vogel)
- Glonoin (Boericke)
- Glonoin (Charette)
- Glonoin (Clarke)
- Glonoin (Phatak)
- Glonoine (Elizabeth Thompson)
- Glonoine (William H Burt)
- Glonoinum (Deriker)
- Glonoinum (Kent)
- Glonoinum (Nash)
- Glonoinum (Vitko)
- Gnaphalium (Clarke)
- Gnaphalium (Phatak)
- Gnaphalium comp (Vogel)
- Gnaphalium polycephalum (Scholten)
- Golden Topaz (Dendrinos)
- Gossipium (Phatak)
- Gossypium herbaceum (Clarke)
- Granatum (Clarke)
- Granatum (Deriker)
- Graphites (Bailey)
- Graphites (Boger)
- Graphites (Borland)
- Graphites (Charette)
- Graphites (Clarke)
- Graphites (Deriker)
- Graphites (Farrington)
- Graphites (Gibson)
- Graphites (Grandgeorge)
- Graphites (Kent)
- Graphites (Nash)
- Graphites (Phatak)
- Graphites (Sankaran)
- Graphites (Scholten)
- Graphites (Tarkas)
- Graphites (Vithoulkas)
- Graphites (William H Burt)
- Graphites naturalis (Vitko)
- Gratiola (Clarke)
- Gratiola (Kent)
- Gratiola (Phatak)
- Gratiola (Sankaran)
- Gratiola officinalis (Deriker)
- Grindelia (Boericke)
- Grindelia robusta (Clarke)
- Guaco (Boericke)
- Guaco (Clarke)
- Guaco (Deriker)
- Guaiacum (Clarke)
- Guaiacum (Kent)
- Guaiacum (Phatak)
- Guajacum (Deriker)
- Guajacum (Hahnemann)
- Guarana (Clarke)
- Guarea (Clarke)
- Guarea (Deriker)
- Gummi (Deriker)
- Gunpowder (Clarke)
- Gymnocladus (Phatak)
- Gymnocladus canadensis (van de Meer)
- Gyps himalayensis (Wirtz)