add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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#locally computed
sha256 d9c0431cb803ceb9896ce74f683e6e5a0954e96ae1d9e4028d6e0f967bebd7e4  libcsv-3.0.3.tar.gz