A Gold Coast man acquitted of murdering his Tinder date says he intends to sue a feminist group for defamation after it started what he calls a "hate/harassment campaign" against him.

Eric Thomas, formerly known as Gable Tostee, intends to sue a Facebook group who he believes is defaming him by warning women of his past. Credit:Facebook

Gable Tostee was found not guilty of the murder and manslaughter of Warriena Wright, who fell to her death from the balcony of his 14th floor apartment at Surfers Paradise in August 2014.

Mr Tostee, who changed his name to Eric Thomas in 2015, reported a Facebook group called Mad F---ing Witches to police after it posted screenshots of his Tinder profile with the hashtags "#DontDateEric" and "#StaySafe".

The post published on October 26 told women Mr Thomas was on Tinder in Melbourne.