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Gbx (GBX) is a proprietary file format used to store data in Nadeo games on a file system.
Gbx is commonly stored as a binary format, but text format variants also exist in older game versions (game config in TrackMania Nations ESWC for example).
Contents
Gbx files are serialized objects from Nadeo games that include an additional header describing the type of the main object.
Extension
Gbx files use a double extension format to describe the type of the Gbx, for example, the .Map.Gbx extension is a map file, or the .Replay.Gbx extension is a replay file.
The extension is sometimes written in lowercase like .gbx.