GPIO button control over OSMC

Help and Support Raspberry Pi
1

Ok guys I have a question for you… I’ve built my own MediaCenter from my old VCR Sony SLV-ED33 with RPi3 B

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and I wanted to know… if there any possibility to take control with GPIO buttons over OSMC (or KODI)… I’ve installed OSMC as OS from official image file… so I wanna use hardware buttons of my VCR to control volume, up and down and power (software)
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That Easy Timer regulator is also pressable… it has steps to right and left and center (press)… that orange LED is also a button… And one button on the left side of the VCR is the power button (not switch)… so how can I do that kind of magic???
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2

Well searching on Kodi Forum and this Forum always helps
https://discourse.osmc.tv/search?q=gpio%20control
https://forum.kodi.tv/showthread.php?tid=273043