Programatically get full path to binary in powershell (which, where, Get-Command)
Solution 1:
For the example command provided by the OP question:
PS C:\Users\user> Get-Command gpg.exe
CommandType Name Version Source
----------- ---- ------- ------
Application gpg.exe 2.2.28.... C:\Program Files (x86)\Gpg4win\..\GnuP...
PS C:\Users\user>
You can extract the "Source" field with the following syntax
PS C:\Users\user> $(Get-Command gpg.exe).Source
C:\Program Files (x86)\Gpg4win\..\GnuPG\bin\gpg.exe
Then you can also store it to a variable and execute it with an ampersand (&) preceding the variable
PS C:\Users\user> $path=$(Get-Command gpg.exe).Source
PS C:\Users\user> echo $path
C:\Program Files (x86)\Gpg4win\..\GnuPG\bin\gpg.exe
PS C:\Users\user> & $path
gpg: WARNING: no command supplied. Trying to guess what you mean ...
gpg: Go ahead and type your message ...