Hello,
I got GML file trough translation of SQLServer Spatial into GML, but I can not inspect it, or open it to graphicaly see features. XMLValidator passes the file against schema.
Here is a link to my resulting GML file:
https://drive.google.com/file/d/0B8kUf-xMW81XY09lV2prQ3VUVlE/edit?usp=sharing