GZ always was more for the SPL. They seriously are trying to push the market here (Europe).
Now the started selling Amps which go more SQ like the 2 ch. Uranium GZUA 2225SQ
Generally GZ is known for speaker at a small budget which go quite loud and subs which are offered for a reasonable price. Also the have a monster sub.
They even started up selling batteries, which imo are bought from other brand names (Sonnenschein?) and just label them and ask more money.