Files with gprmc file extension might be found as some sort of GPS related data files.
GPRMC file extension - GPS data
What is gprmc file? How to open gprmc files?
File type specification:
The gprmc file extension was reported to be used for some older GPS format. No further information about the origin, or the exact use of this file type could be found.
This gprmc 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.