Surname Gustavo Gaston (Gustavo Gaston 
) , in the world, is a very rare last name. The cognomen Gustavo Gaston is characteristic of Chile, where it is a very rare surname, and Italy, where it is an extremely rare surname. More frequently, Gustavo Gaston is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gustavo Gaston | Argentina, Ecuador, Uruguay, Chile, Peru |