Files required to be download:
Flash GSI with TWRP use this fix sd card not read in twrp here
reboot to twrp by pressing power + volume up
Perform a factory reset within TWRP. format data
Download and extract system-arm-aonly-gapps-su.img.xz and you will get system-arm-aonly-gapps-su.img
Transfer the system-arm-aonly-gapps-su.img from your PC to your device’s internal storage where TWRP can access it.
Tap on “Install
Change the type from “zip” to “image.
Find and select the system-arm-aonly-gapps-su.img you downloaded.
Choose to flash to the system partition
Install vendor image just like what you did in system image
Once that is done, reboot your device.
Fix : performance copy the build.prop to system/
Bugs: google certification (fix here)
Aosp 9 Redmi Go, ROM for all devices (see above for details)
ROM OS Version: 9.x Pie
ROM Kernel: Linux 3.x
Based On: Aosp 9
Current Beta Version: April 16 2019
Last Updated 2019-05-19