If you mean the one that you can use to clip on some paper, such as plates: The usual outlets do them for something like a tenner.
There should be no problem with them as the load on them is light.
If you start strapping on something heavy like a big GPS you may find that more cumbersome and you have to ensure that nothing will snag with it in any configuration of the controls and any other bit you need during the flight.
Theoretically you also can get a balance problem if your yoke gets heavy with flutter etc but on the whole that is more an issue with gliders and sticks.
Never heard that any powered aeroplane got into trouble due to a yoke mounted GPS and assume (dangerous!) that it would have happened if it was going to be a problem.