Context is 2 friends talking with each other after a night of drinking. The other friend drunk called her ex-boyfriend. The other friend said this.
だから言{い}ったっしょ
酒入{さけい}れてガーッとやればいけるって
Is this the same to やれば出来る? I'm also not sure how ガーッと is used here.
Like "You can do it if you're drunk."