UseGzipCompression Parameter (Expand-Tar Cmdlet)
Whether or not the archive is gzip-compressed.
Expand-Tar -UseGzipCompression SwitchParameter
If this flag is included, the cmdlet will operate on tar archives that have been compressed with gzip. The interface of the component remains the same.
If this parameter is not included, the cmdlet will read ordinary, uncompressed tar archives.