You might could do it with a project treble GSI.(no guarantees)
Follow this guide
Disclaimer * This Script is made for Only S6 and S6 Edge! * The Script Will Wipe All Your Data TAKE A BACKUP BEFORE FLASHING!!! * Flash it at your own Risk! * Your warranty is VOID Knox flags 0x1 * Read Instructions Carefully * I'm not...
forum.xda-developers.com
Note after flashing the treblizer zip, you need to flash the treble TWRP provided in the guide.
After done all of that guide Then in twrp click install, install image and select the GSI and install to system image
GSI:
https://github.com/ponces/treble_build_pe/releases
thread for gsi:
Pixel Experience for GSI What is this? Pixel Experience is an AOSP based ROM with Google apps included and all Pixel goodies (launcher, wallpapers, icons, fonts, bootanimation) Their mission is to offer the maximum possible stability and...
forum.xda-developers.com
Extract the GSI xxxxxx.img.xz into xxxxx.img first before moving to the phone.