TP-LINK XN020-G3v

I want to know if this device could run openWRT.
quiero saber si este dispositivo podria correr openWRT
XN020-G3v

it probably does already ...

Same SoC as in OpenWrt support for Zyxel PMG5617GA, first GPON support !??

Chances are slim to none, you'd have to start from zero for the SOC support.