How to interface Accelerometer, EEPROM, GPS and GSM with Cortex-M?

Hi,

You should use any of the communication interfaces depending upon your I/O lines and project needs.

You can use GSM/GPS using UART/SPI communication & also it depends on the GSM/GPS Provider like what kind of interface they are providing

For Accelerometer/EEPROM many of the providers are giving an I2C interface.

And also check the Microcontroller what kind of interfaces are available.

Hope this clarifies your question.