St. Thomas, also known as Saint Thomas the Apostle, is believed to have come to North Western India during the reign of Gondophares, also known as Gondophernes. Gondophares was a Parthian king who ruled over the Indo-Parthian Kingdom, which covered parts of present-day Afghanistan, Pakistan, and Northwestern India.

The arrival of St. Thomas in North Western India can be traced back to the 1st century AD when Christianity was spreading to various parts of the world. According to traditional accounts and historical references, St. Thomas traveled to different regions to spread the teachings of Jesus Christ, and one of his journeys is believed to have brought him to India.

During his time in India, St. Thomas is said to have established Christian communities and preached the Gospel. He is believed to have converted many people to Christianity, including high-ranking officials and members of the royal family. Gondophares is said to have been one of the converts to Christianity through the influence of St. Thomas.

The exact details and historical evidence regarding St. Thomas' presence in North Western India are limited. The primary sources of information are ancient Christian traditions, folklore, and accounts passed down through generations. However, archaeological discoveries, such as the ancient Christian crosses found in the region, provide some support to these claims.

It is important to note that the history of St. Thomas in India is a subject of debate among scholars. Some argue that there is insufficient evidence to confirm his presence, while others believe that the oral and written traditions carry some historical validity. The story of St. Thomas in India has been an integral part of Christian traditions in the region for centuries.

In conclusion, St. Thomas is believed to have come to North Western India during the reign of Gondophares, a Parthian king. While the historical evidence is limited, the accounts of St. Thomas' presence in the region have been passed down through generations and form an important part of Christian traditions in India.