The RetroSpy Game Boy Printer support works perfectly. Game Boy thinks that it is using an actual printer!
@publius it's essentially a printer emulator, so you just get the still. I have had decent luck with video by popping the Game Boy Camera into the Super Game Boy and piping that into a cheap capture card if you want to grab video.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko