Add this code to the Custom CSS field on the Appearance tab of your Google Maps widget’s settings:
@media (min-width: 480px) {
.eapps-google-maps-bar-container {
left: 0 !important;
}
.eapps-google-maps-map-container {
left: 320px !important;
width: calc(100% - 320px) !important;
}
.eapps-google-maps-bar-toggle {
display: none;
}
}