Plugin to load a Geosoft(c) GRD format file as a temporary QGIS raster layer
Save repository to disk as a zip file. Use QGIS Plugin Manager to load directly from zip file.
Once the QGIS grd_loader Plugin is installed, click on the 
icon from the Plugins Toolbar . From here you can search for a GRD format file and load it as a raster grid. If this GRD has an associated xml file you can then just click on the OK button to load the grid. If no XML is present, manually enter the numeric EPSG code (e.g. 4326 = WGS 84 Lat/Long), then cick on the OK button
Plugin construction-Mark Jessell using QGIS Plugin Builder Plugin
GRD parser- modified from Fatiando a Terra code with help from Loop Project