A new car-borne gamma radiation survey and data management system has been developed in order to enable a wide-area and quick survey of gamma radiation level in an environment. The data on gamma radiation level can be used to create an area mapping of baseline gamma exposure which is useful for identifying irregular spots that may appear in the area. These spots may be the consequences of an unintentional radiation accident that happens nearby, someone intentionally leaving a radioactive source to cause harm to passer-by, or a change in commercial activity in the area (e.g. mining). The new system utilizes a large NaI(Tl) detector and is also equipped with gps receiver and camera (optional) that can synchronously record radiation, location, and visual data. The system also has data management software that can store important information in a remote database as well as recall the information for later analysis. The software has been designed to accommodate multiple detectors. Result of the comparisons between the new system and a conventional system will be presented.