Bruno is good but I'm not sure we need someone like him. He's a sort of Ramsey/Özil hybrid while not as good as either, closest comparison I could give is Eriksen probably.
Gelson is an exciting prospect but frustrating as shit. He'll destroy every full back anywhere all day long and then inevitably fuck up the final ball. Definitely wouldn't mind taking a punt on a free though, he offers pace and trickery out wide which we sorely lack and even if Emery couldn't improve him and he didn't work out we would make a guaranteed plus on him after a year or two