HOW TO
ArcGIS for Desktop 10.1 reads, imports and exports GML Simple Features or GMLSF format. GMLSF is based on the GML 3.2.1 specification. This functionality requires the Data Interoperability extension to be installed, but does not require a license.
Read GML
Access the two formats in the FME Reader Gallery.
Import GML
Use the Quick Import tool from the Data Interoperability Tools toolbox to import GMLSF and WFS services based on GMLSF to a Personal or file geodatabase. Refer to ArcMap: Using the Quick Import tool for steps to do so.
Export GML
Use the Quick Export tool from the Data Interoperability Tools toolbox to export a feature class to GMLSF. Refer to ArcMap: Using the Quick Export tool for steps to do so.
Note: WFS is a read-only format so it is not available for export.
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