The phrase "gunning for" means to pursue or target with determination. This phrase may also be interchangeable with other similar phrases or idioms such as "going after", "seeking", "chasing", "aiming for", or "hunting down". Each of these synonymous phrases implies an intense effort to achieve a goal or objective. "Going after" suggests an active pursuit, while "chasing" implies a more active pursuit. "Aiming for" suggests a target to achieve, while "hunting down" suggests a more relentless pursuit. Regardless of the specific phrase used, the intent is clear - to pursue something with zeal and single-minded focus.