I thought I would do a little sleuthing on this issue while waiting for it to clear - which could be a long wait in this part of the county...
I put on my deerstalker hat and deduced the following using my version 4 hand control equipped portable CPC 800 and permanently mounted CPC 1100...
I woke my observatory scope and allowed the GPS to link. Checking the results, I found that the time and location were correct, but the date was wrong. I went to the SCOPE SETUP menu and selected SETUP TIME-SITE. In this menu you can edit the values for time, date, location, time zone, etc. I corrected the date and exited the menu.
I use SkySafari to control my scopes. When I initially discovered the GPS issue, connecting to SkySafari indicated that the scope was pointing to about 40° below the horizon! Tonight, SkySafari showed that the scope was pointing to the proper position in the sky. Since it's cloudy, I couldn't actually test by doing a GOTO, but based on what I saw, I'm guessing it will work properly.
I also discovered that if you enter VIEW TIME-SITE in the menu, the date reverts to the incorrect value even after correcting it in the SETUP TIME-SITE menu!
Since I wasn't sure if the latitude and longitude values were obtained from tonight's GPS link or retained from the last session, I decided to check my CPC 800 which was last used about 200 miles away. After the GPS linked, my current latitude and longitude were displayed along with the correct time. Again, the date was incorrect. I corrected the date as above and everything seemed fine.
I may purchase a Nexstar+ HC just to have the ability to obtain future updates, but I'm hoping all that's absolutely necessary to resolve this issue is entering the correct date!