Very common greeting in Austria and Bavaria loosely translated into "good day" having Catholic origins. Despite declining church attendance / affiliation, it's not unusual in those regions to hear it from an immigration/customs officer, a train conductor or even a McDonald's employee.
May draw some sarcastic replies from Protestant Germans up north because they tend to interpret that greeting as "greet God".
Food stand employee: Grüß Gott!
Customer: Ich hätte gerne einen Hot Dog und einen Krügel Bier. (I would like a hot dog and a pint of beer)
A greeting used in the German state of Baden-wuerttemberg. It’s like „hello“ or „ good day“ for swabians.
Grüß Gott! How are you doing?