Zyp backend do not support GUI filter where yum backend does it...
I am not abble to compile the code but I have try to done the fix by adding in zypp-utils.cpp in function zypp_emit_packages_in_list :
if (i == PK_FILTER_ENUM_GUI) {
					print = FALSE;
					zypp::Capabilities c = i->requires ();
					for (std::vector<zypp::Capability>::iterator itc = c->begin ();
								itc != c->end (); itc++) {
						if (itc->matches("gtk") == CapMatch(true))
							|| itc->matches("qt") == CapMatch(true)) {
							print = TRUE;
							break;
						}
					}
					
				}

I am quite sure that can not work because I can not compile it and test it but I report the need and a basic idea to fix it...