Even if you have a single transistor, with wide gate, it is recommended to fold its gate to form a multi-finger device, with aspect ratio around 1.
Interconnects matching is important not only from the viewpoint of resistance matching (or IR drop, or metal debiasing), but also from the viewpoint of capacitance matching, or delay matching - of course, that all depends on the requirements, on the circuit, and on the application, as ljp2706 correctly mentioed.