Working on some cracks and gelcoat repairs on the outside of this Aramid Bob Special.

Any advice on repairing the crack seen here? I pushed on the hull below the crack, and the crack began to "grow" and get bigger.

I can't see it on the other side of the canoe, because that's where the foam is.

Would scoring with a blade, sanding, and a gelcoat repair be enough?

First step for me would be to flake off some of the gel coat and see if the weave underneath is damaged. If not you've got a simple (albeit in your case a bit larger) repair job.

Nova actually has a video on repairing their gel coat:
gel coat

If the kevlar is damaged it would depend on how much damage there is. I like to repair kevlar with epoxy and kevlar material but there are some significant caveats to that especially with gel coat involved. Again nova has a video:
repair

If the kevlar is damaged I would say you'll probably use a combo of the two approaches (repair and then gel coat).

Good luck! Looking forward to updates.