Here is the trick to send executable files in gmail.
Ok let say the file that you want to send name is Executable.
1.Go to Folder Options (My Computer > Tools > Folder Options)
2.In View tab, uncheck “Hide extensions for known file types“.
And the file will look like this
3.Then rename the extension .exe with other extension like .jpg. Windows will prompt a warning message, just click “Ok”. The file icon will be changed to .jpg icon and now your executable file is in .jpg format.
4.Send the file to the receipent.
5.After the receipent recieve the file, ask them to rename the extension file with .exe or it will not work.