Oh hey. I didn't realize anyone was still pushing that long since debunked canard.
The guy in question was a lying hack, who purposefully set up his fields next to a farmer who grew the GM crop and then purposefully harvested the crops that were along the connecting edge of the field so he could replant them without having to have bought them. When he was called out on that, he lied and blamed cross-contamination, but there was no way for his subsequent harvest to be 99+% the GM crop from cross-contamination unless he had collected and planted them on purpose.
So, yeah, he was sued. Including by his neighboring farmer for theft.
It has had serious discourse and research for 24 years. Greenpeace is just an anti-science hack group.