try FD krill...floats at surface, brightly colored, smells, and i haven't had a gar yet that didn't eventually convert to taking it. it may take some time, but it's a great "gateway" feed in terms of converting from live to non-live as well as just getting fish to eat. make sure it sees you drop it in front of the fish. you can also put it on a piece of hard acrylic tubing and wave it front of the gar (all these tactics are covered in pinned topics and other posts). good luck--
--solomon
PS-- you tried the worms, if they don't work then don't bother with them again. i have fed them on occasion in the past but it's been years since messing with that relatively inefficient feed type.