Question may have been asked before.
Just incase it hasn't and I am too lazy to look through post.
I have seen some people say they use it as a stand alone program instead of with a certain program like gimp.

I want to use it for my work and don't want to download it to their computers if I don't have to. Is it possible to put it on a USB and use it just from there?

The online GMIC is down at the moment (or was last time I looked) and doesn't have the most up to date stuff either.

G'MIC does have a command line based interface (non-GIMP plugin). It's even more powerful, but I'm a GIMP guy so never really pursued using the command-line interface. It's a separate download from the GIMP plugin, Sallyanne.

The command line interfact, as I recall, does not need (or use) an installer; just unzip in a folder and use it as is (but will take a bit of a learning curve).

You could use a portable copy of GIMP (samj/partha), which includes GMIC.

Thanks guys

Assuming there is internet connection at work, you can use G'mic Online. Safer that way as no files will be written to your work computer HDD.

I used to racer. Unfortunately it hasn't been updated for some time & doesn't have what I need.