When using the question "Wie geht's?", what is the difference between the following two replies?
Gut und ihr?
Gut und ihnen?
When using the question "Wie geht's?", what is the difference between the following two replies?
Gut und ihr?
Gut und ihnen?
Maybe you misunderstood the first reply. Nobody would say »Gut, und ihr«. You might hear:
Gut und dir?
This means exactly the same as
Gut und ihnen?
Both is in english:
Good, and how about you?
German has a T-V distinction as described in detail here on wikipedia. This article also contains a section with details about German language.