I tried searching the arm archives but every time I searched for "galaxy tab", I would get a few results on the screen, then my disk would thrash and eventually I would get a Brave error that there was failure with the page display . . not sure what is going on . . anyway . .
Is the answer to my Subject Q positive? I have an old GT3 and it is deadly slow and unusable, I thought it might be interesting to get F running on it as an exercise . .
So based on a quick search [1] it looks like it's a Marvell PXA9xx something or another chip. I don't see any device tree upstream that really matches and if that spec is correct it has a PowerVR SGX540 GPU which is closed and not well supported so you will at the very least need to find a device tree which may work with our kernel but it won't be an accelerated UX else you'll need to do a custom kernel from elsewhere.
Peter
[1] https://www.gsmarena.com/samsung_galaxy_tab_3_7_0-5422.php