Is the GPU minig working? Or only CPU?
Normally I'd say CPU/ASIC only for Scypt, however difficulty is pretty low, so maybe give the GPU a go for a while and see if you can grab some coin.
About this CPU mining, is it possible if I tried to mine using a laptop that are running in an AMD APU processor?
Will it be worth it?
You *may* net a few coins.
If you're trying from an education viewpoint, then sure.
If you're trying to make some money, I'd say do not try with your laptop.