Knowing BMW, they would call this a "Gran Sedan"; since the "Gran Coupe" is a 4-door sedan with a hatch, it stands to reason that a Gran Sedan is a 2-door coupe with a hatch.
"Shooting Brake" is such a ridiculous term; it implies a high probability of brake system failure. Being a British term doesn't lend it any credibility, since Brits call these:
this:
Once they sort out their linguistics of dessert vs. breakfast I'll accept their automotive terminology.