GDA (GJoy Dex Analyzer) is a Windows-native, closed-source Dalvik bytecode decompiler and Android APK reversing tool, written in C++. It provides a GUI for interactive analysis, a CLI for batch operations, and a socket-based server for programmatic access. The open-source components in this repository include Java and Python plugin APIs for scripting analysis tasks (e.g., string decryption, method tracing), example scripts, and skill definitions for LLM-driven automated malware analysis. The core decompiler is not open source, but the plugin interfaces and skill scripts are well-structured and reusable for integrating GDA with other tools or AI agents. The repository also contains color themes, documentation images, and a DEX patching utility.