It's important to note that:
* This is likely a very common name: There may be many people named Gylberto Eusebio, and it's impossible to know which one you're referring to without more context.
* Nicknames are personal: People may have nicknames that are only known by their close friends and family.
If you have additional information about Gylberto Eusebio, such as his profession, location, or a photo, it might be possible to find out if he has any nicknames.