Did you just stumble upon a file that has been digitally signed by G P Software? If so, please read on.
You will probably see G P Software when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the additional details from the G P Software digital signature with the following procedure:
Here's a screengrab of a file that has been signed by G P Software:

As you can see in the screenshot above, the Windows OS reports that "This digital signature is OK". This implies that the file has been published by G P Software and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can examine all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also see the address for G P Software, such as the street name, city and country.
Thawte Code Signing CA has issued the G P Software certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the G P Software files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the G P Software files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by G P Software.
| Detection Ratio | File Name |
|---|---|
| Not available | dopusrt.exe |
| Not available | dopushlp.dll |
| Not available | dopusrt.exe |
The analysis is based on certificates with the following serial numbers: