GSview is a graphical interface and cannot function alone. It requires an underlying engine to interpret files:
: The most straightforward way to obtain a registration key is by purchasing the software. Look for the official website or a reputable software retailer. Gsview 5.0 Registration Key
GSview 5.0 does for basic functionality. While it was originally released as "registration-ware" by Ghostgum Software, it is fully functional without a code. How to use GSview 5.0 without a key GSview is a graphical interface and cannot function alone
The Ultimate Guide to GSview 5.0: Registration, Legacy Use, and Modern Alternatives Gsview 5.0 Registration Key
If you are experiencing issues with gsprint.exe asking for registration, note that with recent versions of Ghostscript, gsprint.exe may not work correctly due to security changes.