It really matters on the design of the system and if the BIOS were designed to be accessible. Not just the GBA, but the GB had a BIOS. Other systems utilize the BIOS to provide simple utility, taking away some of the overhead you'd have with embedding the same basic libraries in all software. Early microcomputers tend to have internal fonts and some function to simplify using them. All iterations of the Spectrum would be an example. In fact, pretty much all games on there utilize different functions from its BIOS, including string manipulation, mem copy, and IO.
Funny situation with the N64 is that although the system doesn't have an accessible "internal font", all bootstraps had a 1bit font that could be used as one. Nobody used it of course (though a few cloned it for their internal debuggers), but it's part of the specification.
The 64DD, on the other hand, provided several functions for printing its 6-8 internal fonts. They're actually the same fonts stored two different ways, though I'm pulling a blank on just how many there were. It also had a generic sound bank containing stuff from the Foley library. It's still to be deduced if anybody bothered using any of it. Only expansion disks have been dumped so far, and they all utilize their own resources.
The PSX was designed along the same lines, so I think you'll find similiar functionality if you poke it hard enough.