Hi Michael,
Try this:
import arcpy, os
arcpy.env.workspace = r"<path>"
workspaces = arcpy.ListWorkspaces("*", "FileGDB")
for workspace in workspaces:
print workspace
n,t = os.path.basename(workspace).split(".")
xml = arcpy.env.workspace + os.sep + "{0}.xml"
arcpy.ExportXMLWorkspaceDocument_management(workspace, xml.format(n))