The best replacement for gorilla glass is sapphire.

The best alternatives to gorilla glass are rated as following:
★★★★★  sapphire
★★★  dragontrail
★★★  standard glass
★★★  gorilla glass 2
★★★  gorilla glass 3
★★  tempered
★★  glass
★★  screen protector
★★  super amoled
★  super clear lcd
★  normal glass
★  scratch resistant glass
★  sapphire glass
★  dragon tail
★  sapphire crystal
  corning gorilla glass 2
  scratch-resistant glass
  amoled
  gorilla corning glass
  ogs

Your alternative for gorilla glass is not listed? Suggest!
Speaking about gorilla glass, one probably shouldn't forget about screen protector.

Other search terms related to gorilla glass and their ratings are:
★★★★★ screen protector
You have in mind a companion for gorilla glass and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gorilla glass in all years. Click on graph for more.
gorilla glass
sapphire
dragontrail