Fuck you, it wasn't exactly shit, but it was geared towards young kids and had all the plot and character that goes hand in hand with that genre. If you're looking for a hot-blooded action animu, GL is fucking awesome. If not, then it comes off as extremely "meh".
/a/ sucked its cock when it was being aired. Everyone fucking loved Kamina and it was a huge thing when he died. Then the post-timeskip shit started and the trolls appeared. The show became super mediocre and even shit at times, barring Kittan's death and final battle, and then /a/'s opinion on it shifted. Now, newfags just take the troll's opinion as gospel and try to fit in by saying it sucks shit.
tl;dr: It's not for everybody, but it's good.