| Author (number of quotes) | Description |
| Ga |
| Gabor, Dennis (1) | |
| Gabriol, Salamon Ibn (1) | pen name of Salamon ben Jehuda ibn Gabriol, Spanish poet and philosopher |
| Gaede, Bill (1) | Argentine engineer, programmer |
| Gaiman, Neil (39) | English author and poet |
| Galilei, Galileo (8) | Italian scientist |
| Gamow, George (1) | Russian-born American physicist |
| Gandhi, Mahatma (17) | pen name of Mohandas Karamchand Gandhi, Indian jurist and politician |
| Garcia, Kami (2) | |
| Gardner, John William (1) | American politician and author |
| Gardner, Martin (4) | |
| Garfield, James Abram (1) | 20th President of the United States |
| Gaskarth, Alex (1) | English-American singer and musician |
| Gasset, José Ortega y (2) | Spanish philosopher |
| Gates, Bill (5) | American businessman |
| Gauss, Carl Friedrich (2) | German mathematician and scientist |
| Gay, John (1) | |
| Ge |
| Geldof, Bob (2) | Irish-born singer, composer, actor and activist |
| George, David Lloyd (1) | |
| Gerbner, George (1) | Hungarian-born American professor of communication and the founder of cultivation theory |
| Gi |
| Gibb, Jack (1) | American psychologist and author |
| Gibbon, Edward (1) | |
| Gibran, Khalil (1) | Lebanese-American artist, poet, and writer |
| Gibson, Mel (2) | American-born Australian actor, director, and producer |
| Gibson, William (1) | American-Canadian novelist |
| Gide, André (2) | French author |
| Giffin, Emily (4) | American author |
| Gilbert, Elizabeth (19) | American author |
| Ginsberg, Irwin Allen (1) | American poet |
| Gitomer, Jeffrey (1) | American author and motivational speaker |
| Gl |
| Gladwell, Malcolm (4) | English-born Canadian journalist, author, and speaker |
| Glasgow, Arnold H. (1) | American humorist |
| Glasgow, Ellen (1) | American novelist |
| Gledhill, Ruth (1) | English journalist |
| Go |
| Goddard, Neville (1) | American metaphysics trainer |
| Goddard, Robert Hutchings (2) | American physicist |
| Godwin, Gail (1) | American author |
| Goethe, Johann Wolfgang von (15) | German author and poet |
| Golden, Arthur (3) | American author |
| Golding, William (3) | English author and poet |
| Goldman, William (3) | American author |
| Goldsman, Akiva (1) | |
| Goldsmith, Oliver (1) | |
| Goldwyn, Samuel (1) | American producer |
| Goodier, Steve (1) | American anthropologist and sociologist |
| Goodkind, Terry (2) | American author |
| Goodman, Ellen (1) | American journalist |
| Gordimer, Nadine (1) | |
| Gore, Al (1) | American politician |
| Gosling, Ryan (1) | Canadian actor and musician |
| Gotti, John (2) | Italian-American gangster |
| Gould, Stephen Jay (4) | |
| Goulding, Ellie (1) | English singer and songwriter |
| Goya, Francisco (1) | pen name of Francisco José de Goya y Lucientes, Spanish painter |
| Gr |
| Graham, Billy (1) | pen name of William Franklin `Billy` Graham, Jr., American evangelical Christian evangelist |
| Graham, Martha (1) | American dancer and choreographer |
| Graham, Paul (1) | English essayist and programmer |
| Grande, Ariana (2) | American actress and singer |
| Gray, Claudia (9) | pen name of Amy Vincent, American author |
| Grayling, A. C. (5) | English philosopher |
| Grebin, Burton (1) | |
| Green, John (12) | American author |
| Green, Ruth Hurmence (1) | American author |
| Greene, Ashley (2) | American actress and model |
| Greene, Brian (1) | American theoretical physicist |
| Greene, Graham (1) | English author |
| Greenwald, Glenn (3) | American lawyer, journalist and author |
| Greer, Germaine (1) | |
| Gregory, Dick (1) | |
| Gribbin, John (2) | English physicist and author |
| Groening, Matt (1) | American cartoonist |
| Groom, Winston (2) | American novelist and non-fiction writer |
| Gruen, Sara (1) | Canadian-born American author |
| Gu |
| Guetta, David (1) | French DJ, producer and songwriter |
| Guillebeau, Chris (9) | |
| Guthrie, Jim (1) | Canadian singer |