GG Trailers is setting a new standard for tank trailers, born from our expertise building over 125,000 tank cars for rail markets around the globe.The same experience, processes and high standards that make us successful in building tank cars are applied to our tank trailers. No other tank trailer manufacturer matches our expertise. The partnership between The Greenbrier Companies and Groupo Industrial Monclova includes over 10,000 employees and a reputation for quality manufacturing.