His eyes widened when he looked at her, sure, but she was used to that now that she'd been here a little while. These people weren't used to her, Terrans all looked the same so to them her greenness and Nebula's blueness really caught attention. Even off planet people stared at her though, she was the last of her people after all.
Gamora was trying to channel someone like Quill, who would be warm and non threatening so she didn't put her hand on the knife strapped to her thigh because that might startle him. He was young, out in the open looking worried and Gamora wasn't without empathy.
"Are you alright? Did you just blink and end up here?" She asked as she moved a little closer.