The attached article discusses this subject. http://smallbusiness.chron.com/rules-gps-tracking-employees-24502.html
There are a few more things to keep in mind before docking pay. Be sure to discuss with the employee why he was stopped at a bar. Maybe there was shade in the parking lot and he was catching up on emails or paperwork, he wasn’t inside drinking. Or maybe he took his lunch time and the bar has great wings. Could it be a client requested to meet there? In other words, a GPS reading showing someone is at a bar, does not always mean the employee is drinking during work hours. It is never a good policy to assume the worse in these scenarios. Talk to the employee and find out from them. If you have a reasonable doubt, additional follow up may be needed.
If you need assistance with written policies regarding employees on the road or would like a consultation on payroll issues, call on us at CyQuest, your HR Partner.