Gangjee had four bogeys and just one birdie and is likely to miss the cut.
Jason Allred equalled his career-best round on the Web.Com Tour with a bogeyfree 7-under 64 to grab the opening-round lead at the Miccosukee Golf and Country Club.
He leads Christopher DeForest by one stroke.
There are just more two full-field events remaining on the Tour.
