There is not a direct way to save any of the reports from Surfer. To add your vote to this request on our suggestion file, please email surfersupport@goldensoftware.com.

However, there is a workaround which works for most systems. To save the grid report through a script, you may be able to use the BASIC AppActivate command to activate the report window and the SendKeys command to save the report file. Refer to the Surfer BASIC Language Help for more information about the AppActivate and SendKeys commands. 

SurferApp.GridData(path1+"demogrid.dat",showreport:=True) 
AppActivate "Surfer - GridDataReport" 
Wait 1
SendKeys "%fs" + "MyReport.rtf" +"~" 

Updated November 2, 2018