Gibraltar Airport (LXGB) doesn't have much activity in the way of air traffic, however, they do have an operating air traffic control tower staffed by the United Kingdom Ministry of Defence (MoD) Royal Air Force (RAF).
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<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/57048464@N00/4922200679">Gibraltar Air Traffic Control Tower - Gibraltar</a>