Activate „Developer mode“
Activate „Remote connection”
download http://goo.im/gapps/gapps-jb-20121011-signed.zip.

unzip gapps-jb-20121011-signed.zip 
devel-su 
cd /opt/alien/system/app 
cp /home/nemo/Downloads/system/app/Phonesky.apk . 
cp /home/nemo/Downloads/system/app/GoogleLoginService.apk . 
cp /home/nemo/Downloads/system/app/GoogleServicesFramework.apk . 
systemctl restart aliendalvik.service

Tap/Install file in Filebrowser Phonesky.apk

Install google play on jolla