gdal - Exporting File Geodatabase Raster license-free to TIFF or IMG?

Is there a license-free technology that can export rasters from an ESRI File Geodatabase to a file-based raster (e.g. GeoTIFF or IMG file)?

• ESRI has the FileGDB API for "reading" the contents of a file geodatabase, but it has very few features for rasters.


• GDAL has some extensions for file geodatabase, but I've been unable to find one that can export the rasters.