A gsp file extension is related to the Polish software called Grelix. Probably obsolete format.
GSP file extension - Grelix Software packer archive
What is gsp file? How to open gsp files?
File type specification:
The gsp file extension is used by a Polish program called Grelix and used for its compressed files.
Most likely some old format without support. No further information could be found.
This gsp file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open gsp file:
Grelix is Polish software used to protect computer against viruses, Trojan horses and keyloggers.
List of recommended software applications associated to the .gsp file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open gsp file, edit gsp file, convert gsp file, view gsp file, play gsp file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with gsp file - Grelix Software packer archive
Click on the software link for more information about Grelix. Grelix uses gsp file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).