Could a chess GM learn to beat a-

Checkers GM at checkers?

Yes, of course.

One could learn to beat a Taekwondo master at martial arts.

Could Morphy beat a modern checkers GM????

Not necessarily.

I have even heard that a GM is able to learn how to fly an airplane!

i bet the chess gm would bring his clockto the checkers game, and declare that the checkers gm lost on time

Maybe so, but not necessarily like the very best pilots.

A chess GM could even survive in space.

Actually a checkers GM can't even beat a checkers GM in checkers. They have resorted to playing inferior moves to create winning chances for top players.

It's been solved by computers, but not by the human brain.

Even with those inferior moves match scores have stupid amounts of draws, like 2+ 1- 47=.