Core question of this article: What is GELab-Zero, what problems does it solve in real mobile environments, and why does its design matter for the future of GUI-based mobile agents? This article is a full English rewrite of the selected portions of the original Chinese content. It covers the Background, Capabilities, Application Examples, AndroidDaily Benchmark, and Open Benchmark Results. All content is strictly derived from the provided source file, translated and adapted for a global technical audience. No external facts are added. Table of Contents ☾ Introduction ☾ Why Mobile GUI Agents Matter ☾ What GELab-Zero Provides ☾ Application …