Yes gates are only shown airside.
Also be thankful you didn't try landside at the South Terminal, where unique amongst modern airports, there are no Flight Information screens landside save for one hidden in a coffee shop on the first floor. The shiny new screens direct you to check in with big friendly airline logos then you are, presumably left with no option but to head for the shopping.
Unless they're hidden, but the one in Costa is now the only one I can ever find.
What did you think of the many, many buckets to catch the rain water?