From it's possible brother GR3 2017 and from the P9, smartphone users of this model from Huawei are waiting for this until they brought it recently.
Withour that much announcement, Huawei GR5 2017 just gave us a message on their system update (or EMUI updater) section
A huge 2.54 GB worth of update and it is the much awaited EMUI 5.0 update based on Android 7.0 Nougat.
The global tech brand advised that users must have at over 4.5 GB of remaining space in their internal memory. I will try my test to check this phablet once again (as I got the review on it on EMUI 4.1 based on Android 6.0 Marshmallow.