In all honesty, playing Nokia/Siemens based games on GP32 is pointless. Like the_Diabologic says, they're mostly remakes. Crap ones at that, aimed at the mobile phone hungry generation. People will buy anything for their phones.
Now I could understand an N-Gage emulator, but the person who develops that would have no interest in this community, as the general consensus with most users is "N-Gage Sucks". I'm not a fan of the N-Gage but I know there are folk out there who are.