Congrats on your new Gateway, my wife and i bought the same 2014 model Nov 6th 2013 and have been in it for a month and a half so far mostly in below freezing temps with only minor issues. We love it as i am.sure you will as well, what an amazing rv, and with you being a previous Heartland product owner am.sure you know what a great company they are.We were looking at a Bighorn with a bed bath slide and the Gateway for our 2 top of the list rv's and decided on the Gateway, more standard options than the other unit and quite a bit less just for an extra sink. We have aome trim inside and out that needs addressed, a black and grey tank valve that need replaced and a mystery leak under the kitchen sink, i had a major leak there but tightened all the fittings and now just a small leak i believe is coming from between the sink and countertop, thats another warrenty problem, the sink itself is missing a few clips so sags in the front a little. I caused the shelve above the washer dryer prep to break by hanging to much weight on it, not a factory problem i take full responsibility for that one. Really most problems are from parts failure not a manufacture issue.
Anyway, good luck with your new gateway, we love ours and our first experience with Heartland. Safe travles and maybe see you on the road one day!!
Marcus Shelli and Pretty boy Floyd