Man pages matching name systemd-journal-gatewayd.socket in section 8:

systemd-journal-gatewayd.socket.8.en	debian 10 / systemd-journal-remote
systemd-journal-gatewayd.socket.8.de	debian 11 / manpages-de
systemd-journal-gatewayd.socket.8.en	debian 11 / systemd-journal-remote
systemd-journal-gatewayd.socket.8.de	debian 12 / manpages-de
systemd-journal-gatewayd.socket.8.en	debian 12 / systemd-journal-remote