I just had an idea, but first, my situation;
I have a Laptop with internet, and a Desktop without. It is impossible in my current situation to get internet on my desktop. I have Steam and all my games on my superior PC.
Can I download steam on the laptop, update and download gmod on it, and then just copy the update files to my other pc with steam and garry’s mod(which is outdated)?
And if it is possible, what files do I need to copy over?