I agree too. Just the classifications alone seem close enough, and GHB is absolutely a 'club' drug that also happens to be a date rape drug. Back in my heyday, I knew several people that would use it recreationally when we'd go out to an EDM show (or in the hours after we got back to the crash pad to keep the party going).
I didn't read the whole thing, so I can comment on specific content like 'weed being a gateway' drug, but that's been disproven time and time again and this type of propaganda is common from schools and the government as they're bound by archaic laws to portray drugs in such a way.