Need to program 2nd garage door and it won’t let me. I have a linear garage door opener for both doors.
Hmm, looking at the account I want to verify something first. It appears you have a Chamberlain MyQ garage device currently for one of the doors.
The Linear GD00Z Garage Opener is a Z-wave device. It is not learned into MyQ hubs, nor is it learned in on Alarm.com.
The Linear GD00Z would be learned in at the alarm panel as any Z-wave device. On the 2GIG Panel these controls would be found under Services - Z-wave - Wrench Icon.
General Z-wave tips can be found here.
Just to be sure, are you still using the Chamberlain MyQ device? I do not see a Linear device on your equipment list.
Please provide the device model number of what you are currently trying to add.