Terminal point (5)
'terminal point' is the definition.
(I know that terminal point can be written as limit)
This is all the clue.
(Other definitions for limit that I've seen before include "Confine within bounds" , "Restrict - boundary" , "qualify?" , "maximum number" , "verge" .)
(Other definitions for gate that I've seen before include "Attendance; entrance" , "Opening in a wall or fence" , "Movable barrier in a fence or wall" , "Barrier - door" , "Number attending" .)