Buying Garry's mod on Steam?

Okay, so like the title says, I plan on buying Garry’s Mod on Steam. My question is, can I download it on multiple computers? I’m going to be buying a new desktop soon, and would thus like to know.
Thanks.

Yes.

If you buy any game on Steam, the information for the ones you own is not stored on your computer. It is stored on your Steam account. You can download Steam on any computer you want to, log into your account, and play any game you’ve bought on that account. It’s one of the things that makes Steam great.

That’s great, thanks.