Typically, would expect higher OG and FG than intended, because your volume is lower (think of it like a percentage- 2 bad apples in a box of 10 is 20%, but 2 in a box of 5 is 40%).
But yes, I'd just bottle it, and see how it drinks in a few weeks. Still worth reviewing your process- did you boil longer than the recipe called for, could your starting (pre-boil) volume have been low, was the delta volume lost to trub or material in the BK, did you casually drink a gallon of it while watching it boil...you get the idea
