i have the most luck with beemoss
use the lightest line and bober as posible

Are you serious? Blue gill are so easy to catch, a kid can catch them left and right, with no eye sight. Get a normal hook that is small, put a worm of the line, and a couple small split shots. Cast it out, and wait. You can also put the rig on a float if you have weeds, and rocks, that could snag the bait. You don’t need gravy for blue gill. I have had them bite at my fishing lines, as well as split shots, and other non-bait items. Good luck.