Look at other Web resources for Linux & MacOS
https://wilsonmar.github.io/printing/ Great information resource
https://www.cyberciti.biz/faq/how-to-install-networked-hp-printer-and-scanner-on-ubuntu-linux/ How to install Networked HP Printer and scanner on Ubuntu Linux
how-to-install-networked-hp-printer-and-scanner-on-fedora-linux/ Fedora Linux HPLIP setup
https://developers.hp.com/hp-linux-imaging-and-printing HPLIP version 3.20.3
HP does not provide telephone support for Linux printing. All support is provided online at the following web page: https://launchpad.net/hplip. On that page, click the "Ask a question" section.
- First use your OS software installation tool. For GhostBSD 20.04 its "Software Station" Search for HPLIP I found hplip version 3.19.12_3 27.1 Megabytes in size Drivers and utilities for HP printers and All-in-One devices
- Change to Root user. "su" issue your Password
- Use the HP Setup application hp-setup from a terminal command line window to start the process.