Evidence is possible for anything that interacts with the material universe. What would be evidence for god(s)? That depends on the god-claim we're discussing, mainly.
The reason why it would seem difficult if not impossible to judge something as evidence of the Christian god is because that particular superstition is described in uselessly (and usually deliberately) vague terms which forestall accrediting any phenomena with it, in order to claim that all phenomena accrue to it.
The reason why it would seem difficult if not impossible to judge something as evidence of the Christian god is because that particular superstition is described in uselessly (and usually deliberately) vague terms which forestall accrediting any phenomena with it, in order to claim that all phenomena accrue to it.