Hi I had a house in S Qeynos full of my stuff when I stopped playing a few years ago. Is that all gone now or can I get back the house with all my gear in it?
I don't see why it shouldn't still exist if you are on the same character. Hit Menu, then Housing and Leaderboards button. Click the tab for My Houses. Any homes your character owns are on that list.
If it is a prestige house you can access it as has already been described without a problem. If it is a house with rent you will owe a weeks rent to get in, but all your stuff should still be there
Note that if your house was an inn room in one of the suburbs, all the player inn rooms were consolidated so that you'll now find your room at the Lion's Mane Inn in South Qeynos, or the Jade Tiger Inn in North Freeport.