GPS tracking can be disabled or jammed, but it depends on the type of tracker and the method used to disable or jam it. In general, GPS jammers work by broadcasting radio signals on the same frequency used by GPS devices, which disrupts the communication between the GPS device and the satellite. The use of GPS jammers is illegal in many countries, including the United States, and can result in fines and other legal consequences.
On the other hand, GPS tracking can also be disabled by physically removing the tracker or by interfering with its power source, such as by disconnecting the battery. Some GPS trackers come with anti-tampering features that alert the owner if the tracker is being tampered with or disconnected. It is important to note that disabling or jamming GPS tracking without authorization is illegal and unethical.