GeoComply is a geo-location verification software. You can find more info on their FAQ page here
GeoComply is a geo-location verification software offered to iGaming, DFS, sports betting, casinos and lottery companies. The software uses GPS data, as well as Wi-Fi triangulation and IP address matching to determine the physical location of a user with that device.
The company complies with various regulations and standards, and is licensed in multiple jurisdictions, including the United States and Canada.