The Greek adjective Galatikos (G1054) means "Galatian" or "of Galatia" — pertaining to the region of Galatia. It appears in Acts 16:6 and 18:23, where Luke describes Paul's travel through "the Galatian region" or "Galatian country" on his missionary journeys.
The Galatian region Paul traversed on his journeys represents the relentless missionary advance of the gospel. Though the Holy Spirit redirected Paul from Asia and Bithynia, He specifically directed him through the Galatian and Phrygian regions — reinforcing that the Spirit's sovereign guidance, even through apparent detours, always accomplishes God's purpose of planting and strengthening churches.