Deriving from more than one gamemode?

[Megalan]

nevermind, this is gmod limit

[Andriko1]

... no not really... depends on how you think about it
For example, darkrp is derived from sandbox and base, as are many gamemodes, the way it works is:

sandbox is derived from base, darkrp is derived from sandbox, here is a visual explanation:

Base<-Sandbox<-DarkRP