subs. (colloquial).1. Anything offered as absolutely true. Also GOSPEL-TRUTH.
1862. H. KINGSLEY, Ravenshoe, ch. lx. She is a good young woman, and a honest young woman in her way, and what she says this night about her brother is GOSPEL-TRUTH.
1864. Derby Day, p. 35. Apparently unable to resist the powerful influences brought to bear upon him, he replied, in a tone which carried the impress of veracity with it, GOSPEL.
1891. N. GOULD, The Double Event, p. 175. It was true as GOSPEL.
TO DO GOSPEL, verb. phr. (common).To go to church.