Not a structural problem there. Also a pretty simple area to fix. Something like this... Clean and trim the loose glass. Get a short stick of hardwood (maybe 4-6 inches long) that you can fit into the hole. Tie some twine to the middle of the stick. Get some strips of glass cloth and mat. Poke a hole and insert the twine to slide the cloth up against the stick. Wet out with resin. Insert in the hole and position into the keel with the stick on top of the glass and the string out the hole. Weight the string to hold the pieces tightly in the keel till the glass sets up. Cut off the line and build up the glass from the out side to fill in the hole. I would also grind away the gel around the area and finish with a few layers large than the hole to cap off.

There is a repair page showing this kind of thing on a Sunfish I saw recently...

Sunfish Repair with similar issue