Actually, is an testing TP made since fall 2016, oriented to port menus and container/inventory GUI textures from Java Edition to Bedrock Edition more easily and efficient! So, it is not any PC GUI or any Java UI texture. It is a tool that allows you to port Java GUI Containers textures easily while bringing some improvement in some basic interface. And was originally made first since autumn 2016 (Started with HUD and Java Inventory) and continued to autumn 2019 with current features. Updated for v1.17.30 and for the latest Beta version.