Possibly some gerber files (.gbr) can be exported and saved in STL format, which is foremost associated with 3D printers. It is not clear whenever all gerber files can be exported to STL or only certain ones, as no further information about this subject could be found.
Convert Gerber format file to Stereolithography CAD file.
We found one software available in the database for this conversion.
Microsoft Windows software - convert gbr to stl on Windows
A CAD and Gerber conversion software
Convert from gbr file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.