If i have to explain the gap (which clearly means I was not employed), it means you are incompetent, you fail my interview, I don't work with incompetent bosses.
I spent some time in a mountain cave replica in a Nepalese themed restaurant, diligently honing my programming skills without the noise of the outside world. No internet, no mains, no toilet. Just me, my laptop, an angry manager who called the police and 60 charged replacement batteries that fell off a truck.
There I created the art of meditative programming where I learned to program not just my machine, but myself. As a result of this resume gap I am now able to function as a 13.6% more productive employee and have finally met the benchmark of 1.0x engineer. At my former employer I delivered a project which brought them in revenue totaling at least $12, giving me priceless experience because of this training.
In principle they shouldn't be allowed to ask that. if they seem to be giving too much weight to that they are just being lazy on trying to evaluate you and they will likely be bad employers who believe that taking time off for yourself is a red flag
EDIT : When I took my sabbatical and I was dating at the same time, instead of being seen as a scruffy bum it actually did give an air of mystique, since most people at that age were not doing things like that.
FMLA is always a safe bet. Only one available to care for a dying family member buys sympathy and is an area they can’t legally ask any follow-up questions.
I had a six year gap. I tried to found a startup with a buddy and it fell through. I had enough savings to spend time learning new technologies and leveling up my skills. It made me unemployable. It really sucked. Finally taking a temp gig for four months got the phone to start ringing.