To start gnugk on boot-up, add the following lines to /etc/rc.local:

if [ -x ${PREFIX}/bin/gnugk ]; then
	install -d -o _gnugk /var/run/gnugk
	echo -n ' gnugk'
	${PREFIX}/bin/gnugk -t -c ${SYSCONFDIR}/gatekeeper.ini \
		-u _gnugk -o /var/log/gnugk/gnugk.log \
		--pid /var/run/gnugk/gnugk.pid 1> /dev/null &
fi