add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# Computed locally
sha256 af667887bd7a87dc0dbf9ac8d86c96b552dfb8ca9c790ed1cbffaa6131573f6b  doxygen-1.8.13.src.tar.gz