First, thanks to 
septeven Good work!
thiagomsouza80 on runtime.js you can choose a new icon,
you just need add one line
icon: 'http://www.someurlhere.com/figure.png'
se the code example below
(in the last source this code was in line 99)
this.marker = new google["maps"]["Marker"](
{
position: this.coordCarte,
map: this.googleMap,
title:this.properties[10],
icon: 'http://www.someurlhere.com/figure.png'
});
Well.... this plug-in was working well in the preview mode on Construct2, but isn't working in my cellphone, someone with the same issue??
Diego