Why does Goku wear a different Gi in DBGT?


I've always wondered why he changed his gi to a blue top, white belt, and
yellow pants. Is this perhaps due Akira Toriyama never creating the actual
DBGT series? If so, is there an substantial evidence?

![enter image description here](https://i.stack.imgur.com/6HrTE.jpg)




He wore this even during the last episodes of dragon ball z when he went off
to train with Uub so think it just continued from there.

