So you have picked up a stable Android 8.1 ROM for your device, flashed it through recovery but…
You didn’t find GApps for 8.1 Oreo yet. If that sounded silly, probably it did, but here are links for GApps for Android Oreo 8.1
Flashing is very easy.
Just Download the GApps package, copy it to your phone’s internal storage.
Boot your phone into TWRP Recovery (or any recovery)
Click on Install, select the Gpps package and Swipe to confirm flash!
Download Links for Open GApps
Open GApps :
OpenGapps.org now supports Android 8.1 Oreo. Click the link above and download the particular GApps package that you need. Still have some issues? Tweet out to us @Dhananjay_tech and we will surely help you.