Gyrometopus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites.

The articulate midlength part of the exoskeleton (or thorax) has 11 segments, which are divided by narrow pleural furrows.

The margin of the tailshield (or pygidium) is entire, and the frontal two segments are well-defined by narrow pleural and interpleural furrows.

Gyrometopus lineatus, is found in the Lower Ordovician (Floian) of Sweden (Stora Stola, Timmerdala, Västergötland).

Gyrometopus is phacopid in appearance, but unlike in other Phacopina, a rostral plate is present, although it does not reach the inside of the cephalic doublure, as is customary in non-Phacopine trilobites.