Currently, the gc+ does not play with Wii games unless a gamecube controller would work for them. You will need to use a wiimote. You can think of a gc+ as a literal gamecube controller. Anything the controller can do, gc+ can do.
@Aurelio has made a firmware to emulate a wiimote but it has not been released publicly. I believe you can get a beta version of the firmware if you support him on Patreon. Though I am not 100% sure on that.