That's odd, because it's the exact same config I gave you, that is working but doesn't show the correct GPU model, because I forgot to change a properties value from data to string in devices properties.
Try to manually edit it with Clover Configurator >> Devices >> Properties
Before I try that one--I (on a hunch that something was a miss) duplicated the working Plist you sent me (the first one). Then, I made the suggested changes to the Devices settings (see CC screenshot). When I rebooted, my GPU IS showing up in About this Mac (see Screenshot).
So, do I still need to try this most recent plist?