I have a 93 GS500
the targa is for a 2000 SV650
looks just like the targa for a GS500
How does the targa mount? If it uses the headlight "ears" then it most likely will fit. But the SV650 has a funny shaped guage cluster and that may get in the way.
It is very likely that the fairing will fit but nobody can be 100% positive till they actually try.