They hope to make big 'gains' in Congress in the coming election. [=they hope that many more members of their party will be elected to Congress]
Her hard work 'gained' her their respect. [=she has gained their respect through hard work; they respect her now because of her hard work]
a stock that was one of the year's biggest 'gainers' [=one of the stocks that increased the most in value]
(..) Give me the goose bumps. right on the ground. Right in the hostiles' camp. Look, Sully. I want you to learn these savages from the inside. I want you to gain their trust. I need to know how to force their cooperation or hammer them hard if they won't. - Am I still with Augustine? - On paper. (..)2009 Avatar