Guard Tour System: Is GPS Tracking Guards Legal in the US?

A US security company can GPS-track its guards far more freely than most managers assume, but a few states draw hard lines, and the difference between lawful and lawsuit comes down to how you do it. Here is the legal picture, and how a guard tour system stays on the right side of it.

A security company rolls out a guard tour system on its officers' phones, or drops GPS trackers in the patrol vehicles, and someone asks the obvious question: are we even allowed to do this? In the United States the short answer is yes, and more freely than almost anywhere else in the world. No federal privacy law stands in the way. But "more freely" is not "however you like," and a handful of states draw lines that a multi-state operator has to respect.

Start with why a security company tracks guards in the first place, because it changes the legal picture. A guard is not a desk worker. According to the Bureau of Justice Statistics, security guards face roughly 95 violent victimizations per 1,000 workers a year, about 12 times the rate for the average worker and the second-highest of any occupation. They face that risk alone, at night, on sites where help is minutes away at best. Knowing where a lone officer is at 2 a.m., with a panic button attached, is a safety control, not spying. That distinction runs through the whole legal question.

In short: GPS tracking of security guards is legal across the US on company devices, during work hours, with written notice. California is the one state with strict, dedicated rules. The risk lives in off-duty tracking, personal phones, and covert tracking. A guard tour system keeps you on the right side of all three.

Is it legal to GPS-track employees in the US?

Yes. No federal law bans an employer from GPS-tracking employees, and on a company-owned device or vehicle, during work hours, with written notice, the practice is lawful in all 50 states. Courts treat an employee's expectation of privacy in company equipment as low. Employee location tracking gets risky somewhere specific: personal devices, off-duty hours, secret trackers, and using the location data for something other than the reason you collected it.

Those four failure modes cause nearly every lawsuit and complaint:

• Personal phones and vehicles. Tracking an employee's own device without explicit written consent is the fastest way to lose. Keep tracking on company-owned equipment.
• Off-duty tracking. Around-the-clock tracking that captures a worker's evenings, weekends, and doctor's appointments is the biggest exposure. Collect location on shift and stop there.
• Covert tracking. Hidden trackers invite invasion-of-privacy claims and, in several states, criminal charges. Disclosure is the whole game.
• Function creep. Collect location "for safety," then use it to score performance or justify discipline, and you have broken the consent you relied on.

One more federal line worth naming: under the National Labor Relations Act, you cannot use tracking to surveil union organizing or other protected, concerted activity, or roll out new monitoring in response to it. That applies whether or not your guards are unionized.

Which states get strict, and why California is its own category

Most state tracking laws are anti-stalking statutes, and a company satisfies them simply by owning the vehicle or device it tracks. Texas, Tennessee, and Minnesota all prohibit putting a tracker on a vehicle without the owner's consent, and the company is the owner. Those laws bite covert tracking and personal vehicles, not disclosed tracking of your own fleet.

California is the exception, and if you operate there you plan around it. Penal Code § 637.7 restricts using an electronic tracking device to follow a person, with an exception when the vehicle's owner consents. On top of that, Assembly Bill 984 limits monitoring devices to work hours and only when strictly necessary for the job, requires detailed notice, lets workers switch monitoring off after hours, and bars retaliation. And since January 2023, the California Consumer Privacy Act covers employee data. Its regulator defines precise geolocation as location within about 1,850 feet and treats it as sensitive personal information, so California guards can ask you to limit how you use it. None of this stops you from tracking guards in California. It means you do it on company devices, on shift, with a clear privacy notice.

A handful of other states, including Connecticut, New Jersey, and New York, require written notice of electronic monitoring even on company equipment. The safe approach for any multi-state security firm is simple: meet the strictest state you operate in, and apply that standard everywhere. One more wrinkle if you use fingerprint or face scans for clock-in: Illinois, Texas, and Washington regulate biometrics separately and require their own notice and consent. A plain PIN, NFC, or QR check-in does not.

Why tracking guards is easier to defend than tracking office staff

Worker safety is a recognized, legitimate reason to track location, and for security guards it is the strongest one you have. The numbers above are the reason. A guard works the exact profile that makes tracking defensible: alone, after hours, exposed to violence, far from immediate help. Tracking tied to the shift and paired with a panic button protects that worker, and courts and regulators read it that way.

It also produces something your clients increasingly demand: verifiable proof of patrol. A client who is paying for overnight coverage wants to know the rounds actually happened, and "the officer says he walked it" is no longer an answer. GPS and timestamped checkpoints turn patrol into evidence, which protects you in a billing dispute or a liability claim.

There is an employer-duty angle too. OSHA's General Duty Clause requires employers to protect workers from recognized hazards, and workplace violence against lone, late-night workers is exactly that kind of hazard. OSHA does not require GPS, and any vendor who tells you it does is wrong. But a system that locates a lone officer and lets them summon help is the kind of control that duty of care points toward. Safety and compliance push the same direction here.

How a guard tour system does it the right way

Security guard tracking earns its keep when it does three things at once: track the work, protect the worker, and keep location from sliding into surveillance of the person. A guard tour system like COREDINATE is set up for exactly that, and the controls map onto the legal must-haves.

On-duty location you control

COREDINATE records a battery-optimized GPS location trail during the shift, not a constant live feed of where someone is every second. An operator can disable location entirely for an assignment or hide it from view, and your organization decides what gets collected, how long it is kept, and who can see it. That maps directly onto the legal must-haves: work-hours scope, data minimization, and purpose limitation. The control sits with you, by design.

Man down alarm and panic button

The lone worker protection features cover the clearest safety purpose. An officer can trigger a panic alarm manually, and if the system detects a long stretch of non-movement, it raises a man down alarm on its own after a warning. It then opens a voice connection, sounds an audible alert, and shows the officer's last known position on the map. This is the safety purpose that justifies collecting location in the first place, and the part a worker, a client, and a regulator all recognize as protection.

GPS tours and geofencing for large sites

On a sprawling site, a warehouse campus, a solar field, a construction lot, fixed NFC tags at every point are impractical. COREDINATE groups GPS checkpoints and geofences into routes and confirms presence from the GPS position itself. The geofence here serves patrol documentation and officer safety, not blanket location control, which keeps it inside the purpose you disclosed.

Proof your client will accept

Every scan and location builds the other half of the job: the record you hand the client. Reports export to PDF, timestamps cannot be edited after the fact, and the same data that protects the officer also defends the contract. One system produces both, without turning the location trail into a performance dossier.

A compliance checklist for tracking guards

Whatever system you run, the same short list keeps you safe:

• write a GPS policy that states there is no expectation of privacy in company devices and vehicles;
• get a separate, signed acknowledgment for GPS specifically, not a line buried in the handbook;
• name a real business purpose, such as safety, dispatch, or proof of patrol, and stick to it;
• limit tracking to work hours and company-owned devices;
• never track a personal phone or vehicle without explicit written consent;
• collect only the location and time you need, and set a retention limit;
• never track covertly;
• meet the strictest state you operate in and apply it across the board;
• in California, issue a privacy notice and honor a guard's request to limit precise location;
• if you use biometric clock-in, add separate notice and consent for it.

Do this, and the tracking protects your officers, satisfies your clients, and holds up if anyone ever asks how you run it. This is a practical guide, not legal advice. Before you deploy, confirm the current rules in the states where you operate with qualified counsel.

Frequently asked questions about GPS-tracking guards

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