Is it possible to power the radxa zero by connecting some GPIO pins to power? I know this is doable in some other boards
Power the zero via gpio pins?
Yes. That’s how my project is powered.
Awesome! Which ones?
You can connect +5V to either pin 2 or pin 4, and you can connect GND to any of the GND pins (6, 9, 14, 20, 25, 30, 34, or 39). In my case, I connected the (+) output of my BMS board to both pins 2 and 4, and the (-) output of the BMS board to all the GND pins of the Radxa Zero. Just make sure you use a regulated power supply because there’s no overvoltage protection on the board and you risk frying things if you feed it more than +5.3V to +5.5V. And that’s true whether you power it through the USB port or the GPIO header. Pins 2 and 4 on the GPIO header are tied directly to the +5V pins on the USB power port.