BTW I did fix my install and still can't see the the gpus.
yes, it will work. No sense if your HiveOS copy online or offline for Hive server. If offline, you simple cant manage your rig over Hive web interface, but all needed drivers and tools on your local HiveOS copy.
if you cant see GPUs you need post your boot log.
give some time for Hive, he must load and install GPU drivers. (500 MB)
Are you connected your main GPU to monitor over HDMI cable? This is important for first run.
check output of dmesg command, maybe you will see some errors
Are you use last version of HiveOS? What a GPUs in your rig?