The PCG is a sectarian splinter group of a new religious organization called Grace Communion International, formerly the Worldwide Church of God (WCG).

[5] Flurry claims to be a prophet and says that God continues to give him new revelations, and he warns the "Laodiceans", the United States and British Commonwealth, and Israel of their impending destruction through his various media programs and publications.

[7] American preacher Herbert W. Armstrong (1892–1986) started the "Worldwide Church of God" (WCG) during the Great Depression.

[1] A turning point in the conflict occurred when the church, under Tkach, sought to discontinue Armstrong’s book Mystery of the Ages.

In his polemic, which he distributed to WCG members and leaders, Flurry denounced Tkach's rejections of Armstrongism.

[1] Flurry and co-minister John Amos eventually left the WCG and incorporated the "Philadelphia Church of God" in Edmond in 1989 with the stated purpose of continuing Armstrong's teachings.

[1][5][11] Oklahoma City-based Fox affiliate KOKH-TV aired an exposé on the Philadelphia Church of God on November 24, 2008.

[12][13] Amid the COVID-19 pandemic, the Daily Express noted that the PCG, along with other religious organizations, flooded social media with misinformation and fear-mongering prophecies.

[16] The WCG won the initial lawsuit, but the PCG filed a countersuit for the right to reproduce 18 other Armstrong works.

[17] The Philadelphia Church of God is registered as a 501(c)(3) charity and is thus exempt from having to pay federal income tax.