The user experience of GSMPlusVIP is typical of "gray market" software repositories:

Yes, for legitimate use. In jurisdictions like the US (DMCA exemptions for device repair) and the EU (Right to Repair), bypassing FRP for the purpose of accessing your own device or a device approved by the owner is legal. However, using any FRP tool to unlock stolen devices constitutes a crime. Ethical use is paramount.

Many competing tools (like Z3X or Octoplus) require expensive $200+ dongles. GSMPlusVIP FRP Top operates via a credits-based or monthly subscription model, making it accessible for small repair shops.