This article explains how to use google maps API to show that in Syncfusion WPF Maps control as shown in below.
You can show the Google Maps by overriding the Imagery layer as given in the below code snippet.
[XAML]
<sync:SfMap>
<sync:SfMap.Layers>
<local:ImageryLayerExt>
</local:ImageryLayerExt>
</sync:SfMap.Layers>
</sync:SfMap>
[C#]
public class ImageryLayerExt : ImageryLayer
{
protected override string GetUri(int X, int Y, int Scale)
{
var link = "http://mt1.google.com/vt/lyrs=y&x=" + X.ToString() + "&y=" + Y.ToString() + "&z=" + Scale.ToString();
return link;
}
}
KB article - How-to-show-google-map-in-WPF-SfMap
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