GunWerksTexture.zip is a release file of the Minecraft resource pack All My Friends Are Dead, made for Minecraft 1.8.9. It was published on February 23, 2016 and is 0 MB in size. For the full description, screenshots and every other version, visit the All My Friends Are Dead resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.