Uub literally doesn't appear until halfway through GT after he is briefly seen at the beginning, and even then he is barely a major player in GT. They also didn't give Trunks and Goten that same connection they had in DBZ. They're rarely seen together, not to mention they made them super weak in GT.
If you want to watch GT, skip the time they are in space and skip most of the Baby Saga. Otherwise you will cry at how bad it is. You will know GT sucks by the 2nd or 3rd episode.
This post was edited on 9/15 at 2:12 am