Importing gprMax data into GPR processing software could help you in processing B-scans using depth slicing etc. if you do not want to create your own processing scripts in Python or MATLAB. Recently geolitix (
www.geolitix.com) have included a gprMax data reader for their platform that reads in the gprMax merged B-scan file generated by the python script available as part of the gprMax tools to merge A-Scans to B-Scans. If you have your B-Scans created that way you can import them in geolitix and process them there.
There might be other scripts that might be available in converting gprMax data to other GPR formats so they can be used with other GPR processing softwares.