the GSM module is a very unique device that can be configured to do a lot of this like GPRS tracking, making calls sending SMS, internet surfing etc.
This device can be configured to do literally any thing such as making a call or sending an SMS if some one enters your house, calling or sending an SMS if you have fire outbreak at home, the GSM module uses AT-Command here is a site to know more about at command https://electronictechhub.com/gsm-module/ the limitation to this device is your mind and quetions on "AT COMMANDS" you can contact me with this 08140615640