We have found one software suitable in our database for this conversion.
You actually cannot convert gsheet to pdf directly, because .gsheet file is a just a link to a file saved on Google Drive.
When you open your .gsheet link in Google Drive to access the Google Spreadsheet spreadsheet, you can download the file in PDF format using the File ► Download as function in the upper menu. Such gsheet to pdf conversion is good option for printing purposes.
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.
PDF
A pdf file extension is mainly used for Adobe Portable document format, commonly referred to as PDF. All programs that create some sort of documents or projects offer the possibility to export their format to PDF format. A free PDF viewer (Adobe Reader) is available for download from Adobe website.