Just like the title says. Does anyone know how to program a garage door opener to the Kenwood DNX7120 or a similar in dash? Thanks.

 

Is this possible to even do? I've got a 8120 I'll be installing soon...that'd be a cool "plus" to it..

 

Yep, it does..
The DNX7120 even includes two relay control outputs for touchscreen control of external devices like garage doors, security gates, trunk release, and more.

Here is the link to the instruction manual.
Kenwood dnx7120 manual