In 1909, Haywood founded Christ Temple church. Haywood's influence crossed ethnic boundaries, and by 1913, Christ Temple had a bi-racial congregation of 400 to 500 which later grew to 1500. Around 1915, Haywood received a copy of Frank Ewart's paper Meat in Due Season which argued for Jesus' Name doctrine. In response, Haywood invited the evangelist Glenn A. Cook to preach at Christ Temple, resulting in Haywood being re-baptized "In the Name of Jesus" and he in turn re-baptized 465 members of his congregation. Thus facilitating the spread of Oneness Pentecostalism throughout Indiana. The third general council of the Assemblies of God convened in October 1915 and primary on the agenda was a debate on the merits of the new Jesus'-name doctrine vs the traditional trinitarian doctrine. Haywood and E. N. Bell spoke on behalf of the Jesus' Name doctrine and Collins and Jacob Miller spoke against. The result was a draw and it was agreed to readdress the topic at the fourth general council in October 1916. At the fourth general council a statement of faith was enacted which soundly rejected Jesus'-name doctrine causing just over one fourth of the ministers to leave the Assemblies of God. In 1911 Haywood had become affiliated with the Pentecostal Assemblies of the World and after his conversion helped convert the organization to Oneness Pentecostalism. Many of the former Assemblies of God ministers that left in 1916 formed the General Assembly of the Apostolic Assemblies which at the start of World War I merged with the PAW in order for its ministers to obtain noncombatant statues. The new and interracial organization appointed Haywood as its general chairman. By 1924 the PAW split on racial lines due to logistical and social problems created by Jim Crow laws and Haywood was appointed Bishop of the newly reorganized PAW. Haywood composed many gospel songs including "Jesus, the Son of God", "I See a Crimson Stream of Blood", and "Do All in Jesus’ Name". Many of his songs were published in The Bridegroom Songs, which was published by Christ Temple. Haywood was also an author and Oneness apologist. He wrote tracts, such as "The Victim of the Flaming Sword" and "The Finest of Wheat" as well as published The Voice in the Wilderness, a publication that became the official organ of the Pentecostal Assemblies of the World in 1925. Upon his death in 1931, Haywood was interred in Crown Hill Cemetery. In 1980, the city of Indianapolis designated the segment of Fall Creek Drive where Christ Temple is located as "Bishop Garfield T. Haywood Memorial Way" in his honor.
