I have a wanderer. He is a neutered male (neutered VERY young). He doesn't obsess about getting out, but he will absolutely take advantage of someone leaving the gate unlatched or not closing the front door. We think he escapes because he has a larger range, if that makes sense? Like if we lived out in the country or on a farm, he wouldn't really "escape" because we'd have more space than a 44'x130' lot (minus the space the house takes up). Every time he's escaped, he's never gone more than a 1/4 mile away. For whatever reason he always stays within that radius and seems to know exactly where he is. In general he's a pretty independent dog. Not hyper or high drive by any means, but he has a more primitive nature, for lack of a better word. He'll often lie outside for hours and often he will "patrol" - walk slowly around the edge of the yard checking stuff out (he doesn't pace or fence run like GSDs though, he's more deliberate and methodical). It has nothing to do with lack of a bond or being neglected as far as physical or mental exercise, he's just a large dog with a wider range and he loves to be outside on patrol. From his perspective I'm sure it seems arbitrary to stay inside of such a tiny area when there are plenty of things to check on within that 1/4 mile radius.
ETA: This dog is NOT a GSD, he has a totally different temperament but in now way is any less bonded. He is my heart dog, absolutely irreplaceable. He is definitely a mix, but of dog breeds I know a little about I'd say he acts most like a Great Pyrenees (and that is likely 1/4 of his mix).
My GSDs on the other hand have never, ever been runners. I used to let Nikon out as a puppy without going outside with him before we had any kind of fence, no issues.