This project uses GPS reciever Ublox-NEO6MV2 GPS module with ATtiny2313A. The microcontroller communicates with GPS module through the UART. The article explains the communication with GPS module and data processing. The data from GPS are saved to extern EEPROM. The device is supplied from Li-Ion baterry. You can download complete code.
http://www.insidegadgets.com/2013/10/11/playing-around-with-gps-attiny-gps-longlat-logger/
