Source: Wikipedia
The Wall Street Journal reported in 2016 that around 150 U.S. charter schools were tied to the Gülen movement, “ranging from networks in Texas, Illinois and Florida to stand-alone academies in Maryland”.
The Journal noted that like other charter schools “blacks and Hispanics in underserved neighborhoods” made up the majority of the student body, with common themes including “an emphasis on math and science education, Turkish language classes and sponsored trips to Turkey”. (snip)
I’m sure the sponsored trips to Turkey are no longer available.
Gulen strongly denies anything to do with the (faux) Coup. At one time Erdogan and Gulen were very close. They parted ways before the Coup.