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Do you have the latest V1000 AMD Driver installed: V-Series V1000 Drivers & Support | AMD (06/2018).
I have no knowledge of GPIO pin or coding. Seems to be related to Raspberry PI computer.
This is Microsoft Developers website concerning everything to do with Windows and GPIO: Windows.Devices.Gpio Namespace - UWP app developer | Microsoft Docs
You can also post your question at AMD Developer's Gurus: Devgurus
Try opening a AMD EMAIL SUPPORT Ticket and see what they say. Email Form