So you want to couple PCI interface graphics cards designed for Intel/AMD PC architecture to an SBC comprising an ARM-based system-on-chip which does not expose its data buses even to the card, let alone the rest of the world... good luck with that.
I'm not saying it is impossible to simulate a PCI bus with some appropriate interface circuitry and bit bashing from the GPIO, but it would be exceedingly slow.
In any case, if this "minepeon" is intended to utilise PC GPUs, it will be x86 not ARM.
Military and Automotive Electronics Design Engineer (retired)
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