A gcc file extension is related to the GNU C++ development solution.
GCC file extension - GNU C++ data
What is gcc file? How to open gcc files?
File type specification:
The gcc file extension is associated with GNU C++ a compiler, development tool, debugger for programs written in C and C++ programming languages.
The gcc file stores some kind of data used by GNU C++.
This gcc 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.