This gift is Paul's appointment as an apostle despite his persecution of believers prior to his conversion. Paul speaks of his selection as an apostle as if it were a gift that God gave to him. You can translate this in an active form. AT: "the gift God gave me" (See: [[rc://en/ta/man/translate/figs-metaphor]] or [[rc://en/ta/man/translate/figs-activepassive]])
Paul speaks of his preaching the gospel as if he, as a priest, were making an offering to God. AT: "the Gentiles might please God when they obey him" (See: [[rc://en/ta/man/translate/figs-metaphor]])