Question for CM

I want to make a new guild, but it would be very slow to build resources for it.
Would I be allowed to use alts in my guild to make donations to it, to help my build resources faster?

Using multiple accounts itself is not violation; things like giving resources by intentionally losing are violations and may entail warnings and punishments.

As long as the resources you donate are not acquired illegally, what you are trying to do will be absolutely fine.