add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# Locally calculated
sha256    cd948e89cd2d8825fab4a6fb0323f810948d934af7d92c9ee8b5e9e1350e52d7    rrdtool-1.6.0.tar.gz