v1.3

• -x is now implicit,
  and -z parameter is created to allow indexes creation without line number information
• Added -[1-9] compression factor parameter
• code simplifications
• v1.2: Added -[rR] (range) to -[bL] extract options to allow
  indicating a maximum number of bytes (-r) or lines (-R)
  to extract after the indicated byte (-b) or line (-L)
  is reached.

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• gztool-linux.aarch64 : executable for linux Ubuntu on ARM 64 bits
• gztool-linux.x86_64 : executable for linux Ubuntu on x86 64 bits
• gztool-Windows.x86_64.exe : executable for Windows on x86 64 bits

Please, note that there are packages available for Debian/Ubuntu systems on all hardware platforms:
sudo add-apt-repository ppa:roberto.s.galende/gztool
sudo apt-get update
sudo apt-get install gztool