I like to have both:
FP open with root access and the playstore.
Did anybody succsessfully install Google Apps
on FP open?
flash .zip with twrp - http://opengapps.org/
arm, 5.1, pico for bare metal g-services, nano for extras and if you’re gonna collect all the apps anyway, get one of the bigger packages.
Next time please use the search function (little magnifying glass in the top right corner).
Here is the howto wiki:
and here the discussion if you have further questions: