While there is no official or widely recognized public file or software package named the name typically appears in niche online communities (such as gaming, modding, or specific data-sharing forums) or as a placeholder for a collection of miscellaneous files (the "gs" often standing for "Google Sheet," "Game Save," or "General Stuff").
If you have downloaded this file from an untrusted source, follow these steps before opening: gsshit.zip
Since I cannot inspect the contents of a specific private .zip file, here is a general review framework of what such a file usually contains based on common internet naming conventions: Likely Contents While there is no official or widely recognized