Depending on the type of geri-psych floor, you might still get a good opportunity to handle medical problems. On my capstone during nursing school, I did a lot of IVs, foleys, had dialysis patients, fractures... all on top of the psych stuff. It was a lot of fun and I would highly recommend it.
If your floor is entirely behavioral, I would still recommend it as you'll still be getting experience with the older adult population. You'll learn valuable assessment skills physical and mental health. Also de-escalation skills will be great. I think that geri-psych would be a great addition for your experience. See if you like it too!