So I recently install GhostBSD on my Dell XPS 13 7390 and had quite an ordeal setting up wifi.
The system was at first unable to load the intel driver, and then loaded the “Killer” driver which is
what was required but for some reason the wifi was still not being recognized. I found with some research that
a little adjustment was required. The default device was “iwlwifi0”.
As usual, you need to know your wifi network name and password and add that info to /etc/wpa_supplicant.conf
network={
ssid="myssid"
psk="mypsk"
}
then, to get wifi up and running, you need to add two lines to /etc/rc.conf
wlans_iwlwifi0="wlan0"
and
ifconfig_wlan0="WPA DHCP"
then reboot or restart server with:
service netif restart
and you should be up and running.