Gorilla glass does not prevent your phone screen from cracking when it falls.
People have a total misconception of Gorilla Glass. My phone has fell several times without damage and two times with damage. Both times it got damaged, it fell at an angle. The point of impact is everything. On other ocasions with it falling face first, nothing happened.
Up to this morning, i turned around to flush the toilet and my phone fell from chest height, bounced off the toilet bowl and face first onto the floor (THANK GOD! I THOUGHT I FLUSHED IT LOL). I picked it up, dust it off, and there was no (additional) damage.