Nelson McCausland triggered the storm on Monday when he tweeted “the fascinating story of Becket Cook”.
Mr McCausland introduced the interview stating: “A powerful testimony of a life changed by God and some important insights into the whole ‘gay movement’ from someone who has been there.”
Mr Cook was a gay man in Hollywood who had achieved great success as a set designer in the fashion industry.
He described his conversion to faith, after attending a church service, as “shocking and unexpected to me, a Road to Damascus moment”.
He no longer identifies as gay but says he still “struggles” with “same-sex attraction”.
The post provoked a storm of protest, with a petition now formed on www.change.org called “Nelson McCausland Resign from NI Education Authority” for advocating for “so-called gay conversion therapy”.
Upper Bann Alliance councillor Eóin Tennyson said the DUP politician “should be ashamed of himself”.