Overview
The 2GIG GC3 (and GC3e encrypted variant) is a touchscreen all-in-one wireless security panel with built-in Z-Wave home automation, 345 MHz wireless sensor support, optional LTE cell modules, and Alarm.com interactive services when paired with a compatible communicator.
The panel is the brain of the 2GIG system: it supervises wireless zones, drives local sirens, manages Z-Wave automation, and reports to Alarm.com (or your dealer monitoring platform) when a compatible cell module is installed and activated. Installers program zones, user codes, and dialer options in the installer menu; end users arm/disarm from the touchscreen, keyfobs, or Alarm.com app.
At a Glance
| Specification | Details |
|---|---|
| Role | Primary alarm panel + 7-inch touchscreen |
| Wireless sensors | 345 MHz 2GIG / 345S family; eSeries encrypted where supported |
| Automation | Z-Wave Plus devices via panel radio |
| Cellular | Optional GC3 LTE modules (Alarm.com, ADC, SecureNet — SKU specific) |
| Programming | Installer menu on panel; user codes for arming |
| Backup power | Internal rechargeable battery |
| Typical use | Residential/small commercial DIY and pro installs |
What This Panel Does Well
Coordinates intrusion zones, automation, user codes, and central station reporting when cell and monitoring are configured.
Before You Service or Replace One
- Exact panel model — GC2 vs GC3 vs Edge — firmware and modules differ.
- Encryption — GC2e/GC3e/Edge vs standard sensors in the field.
- Cell module SKU — Alarm.com vs ADC vs SecureNet vs Telus.
- Installer code — required for zone changes; document before service.
- Alarm.com dealer — account status, plan, and remote programming access.
Official Sources
- 2GIG product page
- 2GIG Panel Firmware Update Paths - TB2019-08-21
- 2GIG Warranty and Repair Information - Dated 05/01/2018
- 2GIG GC3/3e Firmware 3.2.5 Update - Release Notes Dated 01/2020
Use official 2GIG PDFs and install guides for exact wiring, enrollment, and firmware — specifications vary by SKU and region.
Troubleshooting
Quick diagnostic flow
- Confirm exact model/SKU on label matches official install guide.
- Clear panel AC and cell troubles before diagnosing wireless devices.
- Read zone trouble — tamper and low battery before "missing."
- Verify 345 MHz vs eSeries vs ePlus sensor matches panel hardware.
- For cell modules: ICCID, antenna, RSSI, and dealer platform match.
- Power-cycle panel only per dealer policy — document user codes first.
Symptom-based fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| Zone missing | Range or battery | Replace battery; add RPTR1 repeater or XCVR2 path |
| Encryption trouble | Wrong sensor series | Use eSeries on e panel or standard sensor on non-e |
| Cell fail persists | SKU or activation | Correct LTE module; dealer activates Alarm.com |
| Z-Wave won't include | Prior hub pairing | Exclude from old controller; include near panel |
| Takeover false alarms | Wired loop fault | Check EOL wiring; verify burglary-only zones |
| Cannot arm | Open zone or trouble | Status screen — secure or bypass per policy |
GC3 cell trouble
- Run cellular test from installer menu after module install.
- Verify Alarm.com (or dealer ADC/SecureNet) account matches module SKU.
- Check antenna cable and ANT5XL placement if RSSI is marginal.
- After 3G sunset areas, confirm LTE module is approved for carrier.
Testing checklist
| Test | How | Pass criteria |
|---|---|---|
| Walk test | Installer walk test mode | Each sensor reports at panel |
| Arm Away | Keypad or Alarm.com | Exit delay; interior sensors active |
| Entry delay | Open entry door | Delay before alarm |
| Cell test | Installer comm test | Success; Alarm.com shows online |
| AC loss | Disconnect panel AC briefly | Battery support; trouble reports |
| Z-Wave device | Toggle from panel/Alarm.com | Device responds |
After replacement
Delete old zone, enroll new hardware, update zone name, run walk test, and notify monitoring dealer if central station records zone numbers.
Source: 2GIG GC3/GC3e install and programming guide; GC3 user guide; 2GIG official documentation.