If you want to support the creators, buy the DVD/Blu-ray set (Region 4 or Region 1) and then add Hindi audio via fansubs. This is complicated but legal.
, point out that it was based on the English dub, leading to potential script inaccuracies. Series Review: Dragon Ball GT Dragon Ball GT
While the passion is understandable, searching for "Dragon Ball GT Hindi download" is a minefield.