Hard to imagine anybody knows much about gliders around here......maybe one of the musky guys in the plug forum. They are pretty simple lures. Just a shape that is weighted to float neutral or sink very slowly in a level position. Usually they are nose and tail weighted. As you move the weight towards the center they get wilder and I've seen musky ones that will actually do a circle when twitched. There are lots of videos of musky glide baits on you tube. Here is the first one I found.
I do know Bagley's made a large (7-8") flat sided glider back in the late 80's. It never caught on in saltwater, but it is still made and apparently has a following for muskies. Costs all of $8 so I'm sure nobody in the canal would be seen dead with one
. Here's a link.
Bagley B-Flat Jerk Bait. Most of them seem to get fished pretty fast from what little I've seen.
These new Seibles obviously work. I watched Ernie do a job on me using one one night off a beach. Outfished me about 8 to 0....but it may have just been the godawful screech his 706 was making.
Some guys also use level sinking needles as a sort of glider.