Hi, I installed google play on raspberri PI 3.
Here are instructions, how install:
1, Download rtandroid-aosp-7.1-20170404 from page: rtandroid.embedded.rwth-aachen.de/downloads/raspberry-pi/
2, Open and edit file gapps.sh -> TIMESTAMP="20170207" change to TIMESTAMP="20170901"
3, Run adb
4, Conncet: adb connect (ip-address of raspberry)
5, Run script: ./gapps.sh -a arm (ip-address of raspberry) -i
6, Waiting to end of running scrip
7, Reboot
Works for me.