Adding a garage door opener?

[DaveNW]

I've searched the forums with mixed results. So here's the question:

Suncoast sells a 986 dash button switch with a garage door opener icon. This implies to me that it should connect to a garage door opener circuit behind the dash. How do I do that? The threads I'm seeing here talk about aftermarket mods using used garage door modules taken from other vehicles and so forth. Is there a best practice method to add a built-in garage door opener to my S using that Suncoast switch? I don't want a half-baked mod, or one I'll need to cut up my car to install. Any ideas?

Dave