@emilioraim: instructions for the GSI can be found here: What are GSIs and how to install them? - iodé
check if it is treble compatible using adb:
adb shell getprop ro.treble.enabled
if it returns true, you can install a GSI, people are having lots of success. If you get it working, please let us know in this thread:
(Editable list) GSI support
keep in mind that GSIs do not receive critical updates to firmware, as the device drivers no longer get updated