Not a lot of games with specific GUS support, much less the PNP version.
However, the GUS has quite decent Sound Canvas emulation via MegaEm, I suggest you check it out (eg, I actually prefer how DOOM's music sounds via MegaEm and Sound Canvas over the native GUS built into the game. Probably because MegaEm uses a better patch set than what they included in DOOM).
There's quite a lot of games with Sound Canvas support. Many adventure games from Sierra and Lucasfilm for example.

I tested the emulator megaem roland, for example monkey island. What is the difference with sound canvas?

Two different MIDI standards (Roland MT-32 vs General MIDI which the Sound Canvas supported).
General MIDI was much more widely supported by various hardware, but not MT-32 (at least, not as faithfully).

Gravis Ultrasound - Hardware Mixing Game List

Thank you.

In Monkey Island game, roland sounds better than general midi

jesolo wrote:

Two different MIDI standards (Roland MT-32 vs General MIDI which the Sound Canvas supported).
General MIDI was much more widely supported by various hardware, but not MT-32 (at least, not as faithfully).

To elaborate, MT-32 is an actual device, not a standard.
The Sound Canvas is also an actual device, but this introduced the 'General MIDI' standard, as in, the mapping of instruments was standardized. So any 'General MIDI' device would use the same mapping (even though the instruments themselves might sound a bit different).

So for games that support MT-32, you'll want to use that specific setting with MEGAEM.
For games that support either General MIDI or Sound Canvas, you use the Sound Canvas setting.

Ok. Thank you.

To expand on what Scali said, the MT-32 had a certain level of programmability which is difficult to emulate as wavetable instruments. Some games such as Indiana Jones and the Fate of Atlantis use the default instruments and sound okay with an MT-32 sample set (such as the one available on an SC-55 or the GUS). Other titles like Police Quest II use custom instruments and won't really work at all.

To expand on what Scali said, the GUS brings it's wavetable instrument samples as PAT files that are loaded from disk on demand. This means it is very flexible in this aspect and allows to have different soundsets easily. Same like alternative soundfonts on other RAM based wavetable cards.
Well known alternative sets are e.g. ProPats and ProPats Lite.

elianda wrote:

To expand on what Scali said, the GUS brings it's wavetable instrument samples as PAT files that are loaded from disk on demand. This means it is very flexible in this aspect and allows to have different soundsets easily. Same like alternative soundfonts on other RAM based wavetable cards.
Well known alternative sets are e.g. ProPats and ProPats Lite.

Yes, and in theory you could have customized patch sets for specific games, to make them sound more like the real MT-32.
This only doesn't work when the game uses advanced dynamic modification of the instruments, so you can't 'pre-bake' them in a sample.