Controls on map can be customized via attributes like navigationControl and mapTypeControl. Alternatively setting disableDefaultUI to true will remove all controls at once.
<script src="https://maps.google.com/maps/api/js?key=AIzaSyCvCDkYieuUBmMWon_mfLAfjuaeuosuqow&sensor=false"></script>
<div class="card">
<p:gmap id="gmap" center="41.381542, 2.122893" zoom="15" type="TERRAIN" style="width:100%;height:400px"
mapTypeControl="false" navigationControl="false"/>
</div>