Gundam is the opposite of Robotech, safely to say. Bandai isn't dumb enough to piss off all the fans of the franchise by producing dreck made by low-paid Korean laborers. The stories in Gundam, including AU stories, are often very mature with themes of the horrors of war being the main binding tie. Robotech? Robotech is about a bunch of featureless characters trying to make themselves seem significant.
Robotech fans dont watch anime for the most part (How often do you see Robotech talk about VOTOMS or Madox-01?). So saying Robotech is similar to Gundam is like telling a Chinese person that Japanese is similar. There may be a superficial similarity, but its not understandable.