| Nombre español | Nombre científico | Orden | Familia | English name | G |
|---|---|---|---|---|
| Gallineta | Gallinula chloropus | Gruiformes | Rallidae | Moorhen |
| Ganga común | Pterocles alchata | Columbiformes | Pteroclididae | Pin-tailed Sandgrouse |
| Ganso cenizo | Anser anser | Anseriformes | Anatidae | Greylag Goose |
| Ganso de Egipto | Alopochen aegyptiacus | Anseriformes | Anatidae | Egyptian Goose |
| Garceta común | Egretta garzetta | Ciconiiformes | Ardeidae | Little Egret |
| Garceta dimorfa | Egretta gularis | Ciconiiformes | Ardeidae | Western Reef Heron |
| Garceta grande | Egretta alba | Ciconiiformes | Ardeidae | Great White Egret |
| Garcilla bueyera | Bubulcus ibis | Ciconiiformes | Ardeidae | Cattle Egret |
| Garcilla cangrejera | Ardeola ralloides | Ciconiiformes | Ardeidae | Squacco Heron |
| Garza imperial | Ardea purpurea | Ciconiiformes | Ardeidae | Purple Heron |
| Garza real | Ardea Cinerea | Ciconiiformes | Ardeidae | Grey Heron |
| Gavilán | Accipiter nisus | Falconiformes | Accipitridae | Sparrowhawk |
| Gavilán común | Accipiter nisus | Falconiformes | Accipitridae | Sparrowhawk |
| Gavión | Larus marinus | Charadriiformes | Laridae | Great Black-backed Gull |
| Gaviota argéntea | Larus argentatus | Charadriiformes | Laridae | Herring Gull |
| Gaviota cabecinegra | Larus melanocephalus | Charadriiformes | Laridae | Mediterranean Gull |
| Gaviota cana | Larus canus | Charadriiformes | Laridae | Common Gull |
| Gaviota de Audouin | Larus audouinii | Charadriiformes | Laridae | Audouin's Gull |
| Gaviota de Delaware | Larus delawarensis | Charadriiformes | Laridae | Ring-billed Gull |
| Gaviota de Sabine | Larus sabini | Charadriiformes | Laridae | Sabine's Gull |
| Gaviota enana | Larus minutus | Charadriiformes | Laridae | Little Gull |
| Gaviota guanaguanare | Larus atricilla | Charadriiformes | Laridae | Laughing Gull |
| Gaviota hiperbórea | Larus hyperboreus | Charadriiformes | Laridae | Glaucous Gull |
| Gaviota patiamarilla | Larus cachinnans | Charadriiformes | Laridae | Yellow-legged Gull |
| Gaviota picofina | Larus genei | Charadriiformes | Laridae | Slender-billed Gull |
| Gaviota reidora | Larus ridibundus | Charadriiformes | Laridae | Black-headed Gull |
| Gaviota reidora americana | Larus atricilla | Charadriiformes | Laridae | Laughing Gull |
| Gaviota sombría | Larus fuscus | Charadriiformes | Laridae | Lesser Black-backed Gull |
| Gaviota tridáctila | Rissa tridactyla | Charadriiformes | Laridae | Kittiwake |
| Golondrina común | Hirundo rustica | Passeriformes | Hirundinidae | Swallow |
| Golondrina dáurica | Hirundo daurica | Passeriformes | Hirundinidae | Red-rumped Swallow |
| Gorrión alpino | Montifringilla nivalis | Passeriformes | Ploceidae | Snow Finch |
| Gorrión chillón | Petronia petronia | Passeriformes | Ploceidae | Rock Sparrow |
| Gorrión común | Passer domesticus | Passeriformes | Ploceidae | House Sparrow |
| Gorrión molinero | Passer montanus | Passeriformes | Ploceidae | Tree Sparrow |
| Gorrión moruno | Passer hispaniolensis | Passeriformes | Ploceidae | Spanish Sparrow |
| Graja | Corvus frugilegus | Passeriformes | Corvidae | Rook |
| Grajilla | Corvus monedula | Passeriformes | Corvidae | Jackdaw |
| Grulla común | Grus grus | Gruiformes | Gruidae | Crane |
| Guión de codornices | Crex crex | Gruiformes | Rallidae | Corncrake |