@Lindagaf I looked quickly and I do think that Gonzaga has two religion (Christianity and Catholic Religion + World or Comparative Religion and 2 philosophy (Philosophy of Human Nature + Ethics) classes required. Of course you should check more carefully if your S is considering the school. https://www.gonzaga.edu/Academics/Undergraduate/General-Degree-Requirements-and-Procedures/University-Core/Core-2016-Beyond.asp As an aside I think Gonzaga’s success on the basketball court has given the school increased name recognition out east.
In terms of if non-religious people are comfortable at a Jesuit school it may depend a bit on the school. Fordham was pretty diverse and my S had friends of many different faiths/agnostic/atheist who were happy and felt at home at the school. However, I would say that anyone attending a Jesuit school should: 1) be respectful of religion and 2) be comfortable seeing some religious symbols on campus.