The purpose of this project is to design and build a GPS data logger. This device should be capable of gathering its locational data via geolocating satellites and logging it onto a MicroSD card. This project has a wide audience. For people with pets, this device is a cheap way to log where their pet travels during the day. This device can also be used by researchers in wildlife conservation. The system works with 4 main blocks. There is a GPS module, a microcontroller, and a MicroSD card adapter. The 4th block is a power supply. The microcontroller gathers data from the GPS module, sorts it, and then stores that data on a MicroSD card. The system runs on 5/3.3 volts and can run for at least 8 hours with a single 9V battery. The most notable accomplishment the group has made is getting all 3 blocks to communicate with each other. One area of improvement is the microcontroller. The system can be successfully implemented with a much smaller microcontroller, as the only needed pins are SPI and UART. Another area for improvement is the size of the PCB. Since the pins needed for the system to work are minimal, different and unique PCBs can be “stacked” with common wires traveling “through” the board to save space.