A conservative group is suing to stop same-sex benefits for partners of MSU employees.
The American Family Association of Michigan says the school is violating a 2004 amendment to the state constitution that bans gay marriage.
A lawyer for the group says Michigan State is recognizing same-sex marriage in substance if not by name when it gives health insurance to the partners of gay employees.
In addition to Michigan State, other schools that provide benefits to gay couples include the University of Michigan, Eastern Michigan, Central Michigan, Northern Michigan, Wayne State, Saginaw Valley and Oakland.
A related same-sex benefits case is currently pending before the Michigan Court of Appeals.