Cell (mobil)Phone GPS Tracking software compatibal withe google map

Looking for a software, which can be downloaded in any GPS enabled cell phone in USA which have (or donot have) a data plane. And then that cell phone can be tracked in real time on google map. I am trying to find the location of all my employes which streets they are on. also there movement should be stored in a database, and can be re played later in case we need it