This is an old revision of the document!
Generally not a lot of info on these. However, their datasheets show the (rough?) pad layout, which can be used to help identify them. Used in LCD toys / products.
https://fccid.io/PQ337480DDTG14/Schematics/Circuit-Diagram-2483636.iframe
Some stuff on eBay:
GPLB52A24A dies
NEW Generalplus GPL162006A-E-32 32-CH SoC System on a Chip EMU Board/Module/Card
Generalplus Universal Keypad Board/Module/Card Assembly GPC-1273
Generalplus GPCE063 V1.1 Comair Demo Board/Module/Card Assembly GPC-1333B
Generalplus GPT100A Touch Key/Pad Board/Module/Card Assembly GPC-1248G
Generalplus GPL32 V2.2 SoC System on a Chip EMU Board/Module/Card Assembly
NEW Generalplus GPL32650A-303-EV-C Board/Module/Card Assembly GPL32650A-303A
Chips