Clear GUI [1.13.X] is a release file of the Minecraft resource pack Transparent HUD | UI | GUI - Insanux, made for Minecraft 1.13.1, 1.13, 1.13-Snapshot, 1.13.2. It was published on April 17, 2020 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the Transparent HUD | UI | GUI - Insanux resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.