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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Install qmk_toolbox (https://github.com/qmk/qmk_toolbox/releases) so you can flash the keyboard.
Install qmk.msys (https://github.com/qmk/qmk_distro_msys/releases/latest) if your antivirus tags it, make an exception. If it is windows defender click more info and then run anyway.
You've put it in a wrong file, so check QMK repo to see how firmware structure looks like. GMMK Pro is located in qmk_firmware/keyboards/gmmk/pro/, but it already includes polling rate and keys per scan (You can increase it to 8 or 12), VIA and different keymaps. Here's useful page: