My thanks to everyone who has assisted with unraveling this mystery. Just to dive a little deeper down the rabbit hole; I'm not sure that the CPS for the GM-30 and the GM-30 Plus are the same software. I am utilizing the OEM software from Radioddity website, for the GM-30 Plus - along with the cable supplied for this radio when purchased.
After a lot more troubleshooting, I'm left thinking that there is some glitch between my PC (running current Win 10 OS, VPN, security suite, drivers, etc.) and the CPS / radio connection. Although everything looks good at the onset, something interrupts the connection leaving the CPS to fault / fail without reading from the radio. I've initiated a discussion with Radioddity's support staff but haven't discovered anything that would lead to correcting this issue - so far. Disappointing having a new radio and not being able to program it with the PC.
I'll keep this thread updated if there is any further positive results. Thanks again for your time and suggestions.