The G and the L apparently stood for "Geotechnisch Liga" or "Geotechnical" (a synonym for geoengineering?) League. Kind of a weird name in Dutch. "Liga" came from Spanish and was normally used in a football context. But naming oddities aside, ZGL was a real organization apparently. And it had been around for a while. The founder had a brief but plausible-seeming Wikipedia entry stating that he’d been born in 1937 and had founded the organization after the 1953 disaster as a community service group to shore up dikes and aid people in disaster planning. Since then he’d passed away, but the charter of the ZGL was worded in such a way that it would support not just dike-building but any other "geotechnisch" measures that might help protect Zeeland from the ravages of the North Sea. What that added up to, in today’s milieu, was that they were pro-geoengineering and—according to posts and updates from the last week—quite fond of T.R.’s Pina2bo project.