FX gains in IFRS vs GAAP?

Hey everyone, In the section on business combinations, the study materials say that unrealized FX gains hit the income statement under IFRS, but skip to equity for GAAP. But in the section on translation, it opens by saying that both realized and unrealized gains from foreign currency transactions are reported on the income statement, under both IFRS and GAAP. Can anyone clear up this apparent contradiction? Thanks, Ari