Bill of Microsoft (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bill of microsoft</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for gates that I've seen before include "Microsoft's Bill?" , "Stage is set for them to open and close" , "Rich American" , "Openings" , "Confines (student) to college; entrances" .)