add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# Locally computed
sha256 063f1aa3a546cb49323a5e0b516894e4b040007107b8c8ff017aca8a86204130  microcode-20180108.tgz
sha256 6d4deb65ca688d930e188bf93f78430f134097b161e6df4a2ef00728e14965e3  license.txt