Testing on GNU Hurd x86_64 from 2025:
There is 1 test failure:
FAIL: help-version

Details:

/home/bruno/gzip-1.13.56-e549/build/tests/../zmore: line 53: more: command not found
+ echo FAIL: zmore
FAIL: zmore
+ fail=1

Find attached the complete tests/test-suite.log.

On this machine, 'more' is not installed. 'less' is installed.

Bruno