Theoretically, any jersey would be sufficient or acceptable for a day riding or racing on gravel. However, we love the Tellus for a day on gravel, it is lightweight, not constricting, durable and was specifically designed for off-road adventures. If you're looking for something a bit more traditional, you'll want the Ascent Long Sleeve. It provides extra protection from everything you may encounter (rocks, bugs, grime, sun) but with extremely breathable fabric so you don't overheat. Plus, there's three full-size pockets to load up.
The Summit Stratos "12-Hour" Bibs were specifically developed for ultra-endurance events like the Dirty Kanza, one of the world's premiere gravel grinders. They are guaranteed to provide all-day comfort over challenging terrains while being simultaneously lightweight and extremely durable. But, if you're looking for something a bit more baggy, you'll love the lightweight Tellus Shorts. They're not too baggy and when paired with the Tellus Liner you have all-day comfort over rugged terrain.