abbrevia latest release 2007
if theres Gzip improvments someday dont count on non maintained packages
preferable solution is to use external libraries like zlib which are well updated excpt if you like to read and write files for Cleopatra Queen
the archive in my last post is a fully console free pascal clone of gzip from 2003. It is 'static' and do not benefit of external libraries improvements.
anyway, whatever are your goals for archieving purpose, the copyrights around LZO/LZW/LZH where earlier a barrier that felt down in time and these LZ Familly of algorithms are much better than the deflate one used by gzip to avoid licensing...
LZW patent expired on June 20, 2003