How do I port stuff from other source games to gmod?

I want to port the v-22 osprey, the Apache, and the tanks from half life source to gmod. How do I do this?

(User was banned for this post ("Wrong section" - mahalis))

You don’t need to port them. gmod officially supports mounting content from HL:S, just enable it in options

I don’t think it has the ones i listed

They are not models, but are brush-based, as far as I’m concerned. And therefore, are not available. You’d have to model them yourself.