I'm not familiar with the specific meaning or context of "gvg-118". This could be:

1. A model number or product code for something

2. An internal reference code

3. Part of a serial number

4. An abbreviation or acronym in a specific field

Without more context, it's difficult to provide accurate information about what this might refer to. If you have any additional details about where you encountered this term or what field it might relate to, I'd be happy to try and help further.