GDI and Nod will both get Helipads in Scenario Missions from Mission 10 onwards.
They also both get Transport Helicopters.
Nod accesses Helipads in the same way that GDI does: Construction Yard > Power Plant > Hand of Nod.
If you don't fancy Nod having access to Helipads naturally, and would only like GDI to have access, try this mod instead: https://steamcommunity.com/sharedfiles/filedetails/?id=2122072438
If you would like ALL the units from Multiplayer accessible then check out my latest mod: https://steamcommunity.com/sharedfiles/filedetails/?id=2126229454
