glm grid doesn't need the centered class for the event detail map
<div class="glmgrid-small-12 glmgrid-column"><!-- .glmgrid-small-12 .glmgrid-column -->
<div class="glmgrid-row"><!-- .glmgrid-row #3 -->
{if $event.locations}
- <div class="event-google-map glmgrid-small-10 glmgrid-small-centered glmgrid-medium-5 glmgrid-medium-uncentered glmgrid-columns">
+ <div class="event-google-map glmgrid-small-12 glmgrid-medium-5 glmgrid-medium-uncentered glmgrid-columns">
{if $event.locations.lat && $event.locations.address}
<div id="eventDetailMap">
<div id="eventDetail-map" title="Click to enlarge">map...</div>