Here are some basic supplies you'll need if you want to make a Scratch game that's made to look like a Sega Game Gear game. Just click the "See inside" button, put these in your backpack, and import them to whatever project you want to use these in. Give credit to me for providing these if you use them, however!
Sega owns the Game Gear, so credit to them. I got the color pallette from Google Images, so it did come from another website, but the border was made by me. All of the specifications of these are the same as the original Sega Game Gear border and color pallette: The border (on the left) is 160x144 pixels wide as is the border of the actual Game Gear's screen, and the color pallette (on the right) consists of the same 4096 colors that the actual system used.