We have found one software suitable in our database for this conversion.
When you open your .gsheet link file in Google Drive to access the Google Spreadsheet spreadsheet, you can download the file in Excel spreadsheet format (.xls, .xlsx) using the File ► Download as function in the upper menu.
However, you cannot convert .gsheet file to any spreadsheet on your computer, simply because it is but a link to Google Docs and not the actual spreadsheet with the data which is saved in XML format in Google Docs cloud.
GSHEET
Files with gsheet extension are URL links to a spreadsheet created in Google Drive. It is not the actual spreadsheet, just an URL link. You can download the spreadsheet from Google Drive in more typical format, like *.xlsx or *.ods.
XLSX
Files with xlsx extension are s used by Microsoft Excel for its workbooks (spreadsheets) in Office Open XML format. XLSX is the latest spreadsheet format used by Excel with the adoption of XML formatting first used in Office 2007. While older xls files were in proprietary binary file format, xlsx spreadsheets use a somewhat altered XML scheme.