| Gabri García | SPA | 2017/18 | 2 | 0 | 0 | 2 | 0 | 2 | Barcelona U19 | | |
| Maurizio Galantini | ITA | 2002/03 | 4 | 4 | 0 | 0 | 10 | 3 | Carpi U19, Modena U19 | | |
| Italo Galbiati | ITA | 1986/87 | 1 | 0 | 1 | 0 | 1 | 1 | Milan U19 | | |
| Filippo Galli | ITA | 2007/08 | 2 | 1 | 1 | 0 | 3 | 2 | Milan U19 | | |
| Fabio Gallo | ITA | 2014/15 | 6 | 4 | 1 | 1 | 14 | 6 | Spezia U19 | | |
| Daniele Galloppa | ITA | 2023/24 | 6 | 2 | 0 | 4 | 8 | 11 | Fiorentina U19 | | |
| Roberto Galìa | ITA | 2001/02 | 6 | 4 | 1 | 1 | 9 | 6 | Como U19 |  | |
| Davide Gamba | ITA | 2023/24 | 0 | 0 | 0 | 0 | 0 | 0 | Volpiano Pianese | | |
| Maurizio Ganz | ITA | 2013/14 | 1 | 1 | 0 | 0 | 3 | 1 | Varese U19 | | |
| Carlo Garavaglia | ITA | 1991/92 | 2 | 1 | 1 | 0 | 4 | 3 | Milan U19 | | |
| Luigi Garzya | ITA | 2014/15 | 2 | 1 | 1 | 0 | 6 | 2 | Trapani U19 | | |
| Giacomo Gattuso | ITA | 2010/11 | 9 | 5 | 2 | 2 | 15 | 11 | Novara U19 | | |
| Gennaro Gattuso | ITA | 2017/18 | 1 | 1 | 0 | 0 | 1 | 0 | Milan U19 | | |
| Ezio Gelain | ITA | 1997/98 | 6 | 4 | 2 | 0 | 15 | 7 | Livorno U19, Piacenza U19, Empoli U19 | | |
| Augusto Gentilini | ITA | 2017/18 | 1 | 1 | 0 | 0 | 3 | 1 | | | |
| Giulio Giacomin | ITA | 2016/17 | 4 | 4 | 0 | 0 | 9 | 2 | Udinese U19, Cittadella U19 | | |
| Diego Giannattasio | ITA | 1994/95 | 2 | 1 | 0 | 1 | 2 | 2 | Perugia U19 | | |
| Giuseppe Giavardi | ITA | 1993/94 | 2 | 0 | 1 | 1 | 1 | 3 | Inter U19 | | |
| Fulvio Giovannetti | ITA | 2004/05 | 2 | 2 | 0 | 0 | 6 | 1 | Hellas Verona U19 | | |
| Salvatore Giunta | ITA | 2007/08 | 2 | 0 | 1 | 1 | 3 | 5 | Brescia U19 | | |
| Federico Giunti | ITA | 2018/19 | 5 | 4 | 0 | 1 | 9 | 5 | Milan U19 | | |
| João Gião | POR | 2025/26 | 1 | 0 | 1 | 0 | 2 | 2 | Sporting CP U19 | | |
| Josep Gombau | SPA | 2024/25 | 1 | 1 | 0 | 0 | 2 | 0 | Aston Villa U19 | | |
| Carlos González | SPA | 2019/20 | 2 | 2 | 0 | 0 | 6 | 1 | Atlético Madrid U19 | | |
| Pablo González | ARG | 2025/26 | 0 | 0 | 0 | 0 | 0 | 0 | Novara U19 | | |
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