These sites were good when this was created. If you notice any problems, please let me know.

MSDos Gzip:
ftp://prep.ai.mit.edu/pub/gnu/gzip-1.2.4.msdos.exe

OS/2 Gzip 16-bit:
ftp://hobbes.nmsu.edu/os2/16bit/unix/gz124_16.zip
ftp://hobbes.nmsu.edu/os2/16bit/archiver/unz512x1.exe

OS/2 Gzip 32-bit:
ftp://hobbes.nmsu.edu/os2/32bit/unix/gz124_32.zip
ftp://hobbes.nmsu.edu/os2/32bit/archiver/unz512x2.exe

Primos Gzip:
ftp://ftp.lysator.liu.se:/pub/primos/run/gzip.run

Unix Gzip:
ftp://prep.ai.mit.edu:/pub/gnu/gzip-1.2.4.tar
ftp://prep.ai.mit.edu:/pub/gnu/gzip-1.2.4.tar.Z
ftp://prep.ai.mit.edu:/pub/gnu/gzip-1.2.4.tar.gz

VMS Gzip:
ftp://ftp.spc.edu/[.macro32.savesets]gzip-1-2-4.zip
ftp://ftp.spc.edu/[.macro32]unzip.exe
ftp://nic.switch.ch:/mirror/vms/spc/macro32/savesets/gzip-1-2-4.zip
ftp://nic.switch.ch:/mirror/vms/spc/macro32/unzip.exe