This is a polite way of telling somebody to fuck off .
Mate hit the gaps you don't have a chance.
A saying one would use when leaving a place or situation. Like saying "I'm outta here" or "hit the road"
Hey Noah, you're really bad at this game I'm going to hit the gap.
Means when someone tells you to “hit the gap” he/she is telling you to go away in a joking way sometimes can be serious
Nah no one wants you here, hit the gap