Yes, from what I understand, the G20 Rims are interchangeable with the older Altima's, 240's, Stanza's, Axxess', and I am missing another I think. They are also interchangeable with the newer Sentra's and Altima's.
The G20 rims will fit on your '90 since it has the same bolt pattern and I believe the same or very similiar offset.