Okay!
I’ve got Google Play Services working!
root is required.
This did make my Relay more unstable for a few hours but it ironed itself out with updates.
I followed the usual step by step outlined here on a fresh Relay (getting to the home screen, installing Chrome & a home button & a launcher (Nova), signing into the Wink Relay app and updating all the way to Up To Date, Downloaded and ran KingRoot, I used Root Package Disabler to disable winkupgrade & the 3 third-party widgets (Uber, Fitbit, Sky power), replaced the relay app with the one made by acerbix, cleared the dalvik cache, reboot,
NOW! This is how I installed GApps
http://www.devfiles.co/download/xQds6mjJ/gapps-jb-20130813-signed.zip
move this GApps file to your /sdcard/ on the Relay in a new folder
adb push gapps-jb-20130813-signed.zip /sdcard/gapps/
I extracted the zip on the Relay itself using a file manager. (File Commander in my case)
I extracted to the same folder, /sdcard/gapps
Now back to the computer.
adb shell
shell@edison_dvt:/ $ su (You may have to approve on Relay screen)
root@edison_dvt:/ # (from this root shell, type in the following commands individually)
mount -o rw,remount /system
cp -R /sdcard/gapps/system /
chmod 755 /system/addon.d/70-gapps.sh
chmod -R 644 /system/app/*
chmod 755 /system/app
reboot
please reboot the Wink Relay a second time!
I’ve been able to install Play Music from the Google Play app store, cast to my google home, ask the home to play songs and it be reflected on the Relay,
and see the play queue of whats been playing and whats up next. Its MAGICAL!
Like having a screen on my Google Home.
WORKING:
Play Store
Google Keep
Play Music
Youtube (casting and queue features are wonderful)
Calendar
Google Now (took a few attempts, now it loads tiles 
, searches fine, voice is slow and poor)
Google Sound Search (& widget. its cool!)
SO-SO:
Google Home app (seems to be working fine now, used to just crash. I think GMS may be doing silent updates in the background)
Android Device Management (4.3 isn’t supported by the Play Store app, I haven’t hunted an older version yet)
