/usr/share/man/man1/arm-linux-gnueabihf-gccgo.1.gz is in gccgo-arm-linux-gnueabihf 4:8-20180321-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/arm-linux-gnueabihf-gccgo-8.1.gz