i did post what I thought was a relevant thread that got deleted PDQ re the above discussion about Goose Bay and also re steps for 380's and pax welfare on the ground at these remote unscheduled alternate airports that now seem to be used with increasing frequency due to Tech reasons, medi-evacs and air rage diversions.
i also asked the question as to why perhaps they did not continue to gander (whom they were talking to on ATC with their mayday)
the runway is 1000' shorter at Gander v Goose Bay's 11000' but Gander does have better airport handling and pax facilities plus a few hotels in town
the flying distances difference between Goose and Gander from
the mayday position declared over Greenland were about 100-200km more to get to Gander - just a thought