What components would I need to create a gsm signal. In essence creating a small scale gsm network
In essence creating a small scale gsm network
In the U.S. the FCC does not take kindly to such actions.
Your question has nothing to do with Arduino. If yoh need a GSM (legal) module for an Arduino, a GSM shield is available... just Google "GSM Arduino shield"
Why would you want a "gsm network"?
You can create your own network, legally, with XBee or NRF24L01 radio modules instead.