In the world, Gustavo Gaston (Gustavo Gaston 
) is a very rare male forename. The forename Gustavo Gaston is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare boy's name. Very seldom, Gustavo Gaston is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Gustavo Gaston | Uruguay, Chile, Ecuador, Argentina, Peru |