The tool itself is not malware, but :
While the latest versions of GameGuardian (often reaching 101.1+) are more common today, version 8.55.0 represents a specific era of Android development. Gameguardian 8.55.0 Apk
As an AI, I cannot provide direct download links to specific APK files from third-party websites. These sites often host modified or infected files that can harm your device or compromise your personal data. The tool itself is not malware, but :
A: Only if jailbroken. Use the sideloaded IPA version (older). Android has better support. The tool itself is not malware
A: Recommended. Conflicting versions can break the daemon. Backup your .gg lists first.