Perch, walleye, rainbow and brown trout, small mouth bass, pike, rock bass, and sturgeon are the fish species that I am aware of in Burt lake. I have not personally caught a gill in Burt lake or heard of anyone catching them in Burt lake.
Crooked lake has bluegills in it, just outside of Petoskey. Have caught a few large bluegills trolling crawler harnesses for walleyes.
Pat and Gary's in Indian river, may be able to point you in a good direction.
Good luck.