After the BrokenShore you can mount gryphon that flies you to anduin to give Varian's letter. During that flight a dialogue occurs that mentions Gilneas as a people or nation.
http://imgur.com/a/dHvrw
Here is some previous info about Gilneas:
- 4.3 Rogue legendary quest, Gilneas is under controll fo the alliance
https://www.youtube.com/watch?v=dwAB...nel=kur1gaming
- The Ultimate Visual Guide claimed the rogue even was never possible because it was abandoned. UVG is controversial having several retcons, blizzard did say unless the game later shows differently it is canon but that was only days after the release so i figured it might have been said to keep sales up.
- SoO, talking about securing border and keeping a watch on forsaken.
The dialogue can be interpreted differently. Either Gilneans are still waiting to get Gilneas back and preparing to strike. But thinking about it longer it's more about Gilneas wanting revenge against the forsaken and their ready to strike if needed regardless of what the state of Gilneas is.