Rumours that GKD were making a new handheld started back in December, with the idea that they would remake the popular 350H that was released many years ago, and was GKD's first step into the mass handheld emulation market.
Since then, they've developed some incredible devices, the GKD Pixel being my personal favourite.
Now, images of the 350H remake have been leaked, showcasing a metal version of the horizontal handheld, which they are calling the GKD 350H Ultra.

Images were revealed by GKD's owner, Lao Zhang, on a QQ Livestream, which was brought to our attention by X user RetroDeadFred.
That said, it shows what looks like a portable, 3.5" horizontal handheld with a metal body, looking ever so similar to the AYANEO Pocket Micro (which I also love the look of).
It's boxy, comes with an analogue stick on the left, a large DPAD which we all like and what looks like a 1:1 display (or close to), making it great for GAME BOY games.

As usual, please take these leaks with a pinch of salt; this is unofficial news, and it could not even become a reality. But that said, GKD has a history of making great devices, and no doubt people want the Pixel in a horizontal form factor.
If, and a big if, they can get the price right. I am hoping for sub $100 for something like this, and not packed with power. Keep it cheap, keep it high quality, and success will come.

We'll update you with more news once we hear it, but as of now, this is all we have regarding the upcoming GKD Ultra 350H. This likely means it's on its way, and more news will come, if it's real.
You may be interested in the GKD Pixel 2.5 leaks, too. In this livestream, Lao had a handheld in the back that looked like an oversized GKD Pixel with vertical button layouts.