"I'm called by God" heißt doch "Ich bin berufen", nicht "Ich bin gerufen", oder?

Do you maybe mean "Ich habe gerufen"? "Ich bin gerufen" is - if at all - only used in a spiritual sense as in "I'm called by God". If you mean "habe" the difference would be the active and passive voice. Ich habe meinen Freund gerufen. - I called my friend. Ich habe mich umgedreht, da ich (von jemandem) gerufen worden bin. - I turned around because somebody called my name.