Aha! Finally someone who RTFA!
It's hard to tell beforehand if any change will be positive in Africa. Look at the french, who introduced cocoa in Africa years ago. That went very well, until a major price drop occurred and in some regions caused famine because farmers couldn't switch back to other food crops in time.
Besides, GMO has failed big time. Cross pollination has already carried the Roundup resistant genes, f.i. to at least 5 wild species. It's what's killing the cotton belt. These were harmless genes, AFAICT. But there's no telling if mutations in the wild will be harmless.
GMO is not necessarily evil. Look up "Golden Rice". That project had the best of intentions. But if people don't want to eat GMO's, it's end of story. The customer is always right.