without using a custom recovery, it is possible to install google apps if you are rooted. you can use Root Explorer and follow these steps:
Add Google Play without 3rd Party Recovery - Post #25 - XDA Forums
if you want the google apps, you can extract the apk files from the gapps package and copy them into the phone's System\App folder.
I went for the above method.
Took me a couple of times, but seems to work fine.
Just finished an hour ago.. all seems to be in order.


I Think of selling of my Nubia Z7 max.........just bought from adix on 20-9-2014. Use 1 time only, have clear silicon case + temper glass screen protector.......