.GZA File Extension
IZArc BGA Archive File
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What is a GZA file?
Archive file created by IZArc, an application used for file compression and decompression; stores one or more files that are compressed using the "GZA" method of BGA compression, which is an uncommon compression format; can be decompressed in IZArc to restore the original files.
The other archiving method for BGA compression is "BZA," which is used to create .BZA files in IZArc.