arcgis desktop - How to convert *.shp files to *.gmt format type files?

I am new at using GMT (Generic Mapping Tools) and I am wondering if it can use a shapefile of a hydrographical network.

Can I perhaps change my .shp to .gmt format and combine it with a GMT map? If so, how?

Answer

Convert from shape to gmt use this
example code :

ogr2ogr -f "GMT" Hudson_bounds.gmt Hudson_bounds.shp