Read data from RTU with GSM

Dear all,

i get oppurtunity in water process plant, and they want me to install SCADA software and i recomend Igntion.

so the case is i want to monitoring Cathodic Protection in remote area which is the RTU using GSM Celuller as the communication to the control room.

do you have any idea or experiences on this field (RTU with GSM)?, how do i read GSM data in Ignition?

really appriciate your help