| Author | Titles | 1.
| Gaio, Ana | 1 | 2.
| Gaio, Felgueiras, 1750-1831 | 1 | 3.
| Gaio, Gorette | 2 | 4.
| Gaio, Manuel da Silva, 1860-1934 | 38 | 5.
| Gaio, o Jurista | 1 | 6.
| Gair, Angela | 1 | 7.
| Gais, Michael | 2 | 8.
| Gaitán, Juan A. | 1 | 9.
| Gaither, Edmund Barry | 1 | 10.
| Gaivão, Manuel de Gusmão de Mascarenhas | 1 |
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