If we search `gpart` utility at `https://www.freebsd.org/cgi/man.cgi` without specify Manual section (`All Sections`) with search target `FreeBSD *-RELEASE and Ports`, we found `gmap` program manual page. But mostly users need `gpart(8)` as more frequently using program.
Besides, gpart(8) will shadow gpart(1) as it installs in "/usr/local/bin" directory wich is further in $PATH enviroment variable.
Won't it be better to rename `gpart` program in this pakage?
Are you thinking this is referring to biology/gmap? 'Cuz it doesn't install any man pages.
cad/scotch has gmap and gpart, though.