If looking to switch to suretyDIY with a 2GIG panel, this page here covers the necessary steps. Which 2GIG panel are you currently utilizing, is this the 2GIG Go!Control Panel?
I have a 2Gig 2G panel that was put in my house when it was built. That company has since stopped monitoring my system.
Is the cellular module in the 2GIG panel a 2G module? Note that Alarm.com accounts would require an unregistered, 3G or better, Alarm.com compatible cellular module. You can use this module check tool to confirm the status of your cellular module.
What are the make and model of the cameras in question? Note that only Alarm.com compatible cameras can be utilized through suretyDIY A list of cameras can be found here.
Service through suretyDIY, with, or without, 24/7 Central Station Monitoring can be found here. If you are looking to utilize remote control of Z-Wave devices, the Gold Automation plan will be required. You can find a list of features, add-ons and pricing through the previous link. Additionally, should your cameras be Alarm.com compatible, you would need the Alarm.com Cloud Video Add on in order to utilize them.