Her job here was to basically play her usual role and play it straight. Just as she was the bridge between Kirk and Spock in the Star Trek flicks, she was the only grounded "straight" character among the 5 GOTG characters.

That said, she did a fine job as Gamora and I'd say she's probably taken for granted. She's always great in movies like this, unfortunately she's never given the noteworthy moments other characters are given and I think that probably accounts for the lack of discussion on her in this thread. The other four characters in the GOG quintet are absolute hams, so that pushed her to the bottom. I will say I wish her and Nebula got more than one fight sequence though.