Turns out myQ charges a subscription fee for the privilege of using this feature.
I could install an opener like this one, but it still wouldn't solve the in-car integration side of things. Anyone know of any clever workarounds for this? Seems like maybe I could MITM the myQ service since my car and garage would both be on the same WiFi when I'm home, but I don't know if there are OSS replacements for the myQ server software.