: These .bin files are part of "firmware packs" used with the Flash Tool to restore or update the device’s Android or Linux partitions.
In the context of the Google Gemini family of models, "pack.bin" is not a standard download for users. It is likely a part of a firmware update for a device that uses Gemini, or a developer-level resource. System Firmware and Data Integrity gemini pack.bin download
If a deal seems too good to be true on a sketchy forum, the only thing you will unlock is a permanently bricked device. : These