Sega Game Gear & Sega Master System library images for the Analogue Pocket. Based off of the images from libretro-thumbnails.
Check the releases link for the latest zips.
I don't know when I'll actually get around to fixing this. For now it mostly exists to host a collection of SMS images with no guarantee of accuracy as I haven't had a chance to see how well the no-intro datomatic matches with the Pocket library.
To install, unzip the archive of your choice & put the resulting gg folder in the /System/Library/Images directory on your sdcard.