Gus is a common nickname, so without more context, it's impossible to know his real name.
To determine Gus's real name, we would need more information. Here are some possibilities:
- Is Gus a character in a book, movie, or TV show? If so, the character's real name would be listed in the credits or other source materials.
- Is Gus a person you know? If so, you could simply ask him what his real name is.
- Is Gus a nickname for a specific name? There are many names that are commonly shortened to Gus, such as Augustus, Gustav, and August.
Without further information, it's impossible to answer the question.