Gillig Corporation
![Gillig headquarters in Hayward](/Images/godic/202501/15/Gillig_Corporation_HQ4508.jpg")
![A 40ft low floor Gillig bus as a part of UMass Amherst transit service fleet going up the scenic Rt.116 in Pioneer Valley](/Images/godic/202501/15/Gillig_UMass_Amherst4508.jpg")
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![](/Images/godic/202501/15/CDTA_Saratoga_Gillig4508.jpg")
The Gillig Corporation, formerly Gillig Bros., is an American manufacturer of heavy-duty low-floor transit buses based in Hayward, California. Prior to 1993, Gillig also made school buses.
Gillig is the second largest transit bus manufacturer by volume in North America, behind New Flyer. As of 2013, Gillig had an approximate 31% market share of the combined US and Canadian heavy-duty transit bus manufacturing industry, based on the number of equivalent unit deliveries.