I have created a movie tutorial showing you exactly how I performed the conversion using ACE Translator 3000 for our data service bureau. Please see link: http://screencast.com/t/QyhQocKVti
Note: GDSII conversions require closed boundaries, so I used the ACE "join feature" to convert most of your line segments to closed boundaries. The last remaining boundary required our "Join Interactive" tool to finish the job.
Numerical Support Team