Actually, I tried to warn people about this (and the takeover of the US gypsy trucking industry legally by Mexicans via treaty) a couple of years ago. The Mrs. first heard about it during a Commerce Dept. conference concerning NAFTA II. (She has very good sources, being a business/technical editor.)
The bots went berserk at the inference W was selling us out.
They aren't going berserk any more. I am smug.
If by gypsy trucking you mean point-to-point hauling within the U.S., then I am aware of no treaty that allows Mexicans to perfom this task. A Mexican wishing to haul intra-U.S. would have to comply with any visa requirements, or work as an illegal.
We all know that's a problem, but to blame it on some unnamed treaty is going too far.
Belated thanks. Good info about the ongoing sellout of the sovereign nation known as the United States of America. Sold out by the Democrat and Republican hacks in DC and "connected" business interests