If my client came to see me, the GPS didn't work. CBSA would either have to know that he or she was coming to see me—so they would know it wasn't going to work; otherwise they would be concerned....
The GPS has put my client 30 kilometres away from where he actually was, because it's not always accurate or effective. If he goes into a mall to go shopping with his family, the GPS doesn't work. There have been times when it is sounding an alarm when there's no reason to sound an alarm. So yes, there are ongoing problems with the GPS, such that CBSA officers are engaged with the client on a regular basis about it.