There's a few good videos on youtube about this:
Gates are a great added safety feature, but I really think a dog should be TRAINED not to door dash #1. We can have our sliding glass door open and Jackson will not go out of it until he is told. Is there a chance he could see something and run out? Of course there is, so we obviously avoid any doors being left open and I'm always checking to make sure he's in the house. But training really paid off.
The other day, I realized that a back sliding glass door was open just enough to where he could've gotten out. It must have been open for over an hour, my stepdad had been getting firewood, and came in thru a different door. At that point, I was so thankful that Jackson knows not to go outdoors without me as we began working on it as a pup. We don't have the kind of house that makes it feasible to put gates on every door. In my one backroom, we literally have 3 sliding doors at all different corners, we have a main front door, a side porch door, and a back porch door lol. So our house would look quite ridiculous with that many gates.