The events of 2013-2014 that solely aimed overthrowing Erdogan were undeniably controlled by Gulen movement. However they lost the battle big time.

One or two weeks before the coup, some army officials in Izmir were detained linked with a previous army spy case and they were linked to Gulen. The supreme military council was about to be happening with the agenda of sacking multiple army officials related with him.

IMO, coup was not solely planned by Gulen, but they were involved significantly.

Lastly, again, check multiple coup officials' statements.