I don't have any specific information about "gvg-078". This could be a model number, code, or identifier for a product, project, or system, but without more context I can't determine its exact meaning or provide details about it. If you have additional information or context about what this might refer to, I'd be happy to try and help further based on that. Otherwise, you may need to consult documentation or the source that mentioned this code to get more details.