Before suggesting some things, i would like to say big thanks to Майор Доигралесс who's making good port from HL:A it helps a lot for some HL2RP servers. I just came with an idea to make this discussion to discuss which models we would like to see ported in Garry's Mod:
Personaly i would like to see more "item" props like those combine rations for example. But in HL:A it has more things, like boxes of other foods, or aliuminum tins for sugar or other spices, medications, or even containment props which would be nice to be ported out of game.