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I have it on film - me eating a Big Mac in Stockholm.  I had several during
my vacation in Sweden.  All on a gluten-free bun, close to the real thing
and at the same price. In other restaurants, waiters were very accommodating
and knew what I was talking about, and FinnAir was fabulous.  They fed me a
sandwich on real g-f bread as well as a mock rye cracker and cheese.
Helsinki also had a big supply of g-f foods at the large department store
food counter.  I stocked up on bread, crackers, cookies and muesli.  All in
all travelling in Sweden and Helsinki was really easy for a celiac.  Thanks
to Katriina Mdkinen for her tips.