Board Thread:Naruto Discussions/@comment-945885-20140723175903/@comment-28861328-20140726201729

He didn't write anything for GT.

He designed the characters for the anime company, at their request, but he didn't write anything for them (and even then that was limited. Their own guys designed most of the characters, including Super Saiyan 4, and Toriyama pretty much designed whatever they couldn't). Toei did it all themselves. The fact that Toriyama is now directly involved with writing movies that continue his series, blowing GT out of the water, further's this.