add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# Locally computed:
sha256  b0360a3aece8a29d131531da7bfc36d57c30c6eed30ff1ea360f7cccea1d62d7  odhcploc-20111021.tar.gz