Just did something really stupid. Need advice

Hello,

I was attempting to mount a TV mount in the bedroom of our 5th wheel and when drilling the pilot hole it was really tough drilling and then all at once it gave way and I ended up drilling through the outside wall. The hole is about 1/4 inch and it is completely through the gelcoat. You can see through it to the outside.

What is the best way to repair this? I am literally sick to my stomach about this.

Thanks!

Dave