Gargoyle Button.

[Chengi]

How would I make a button, which is only pressed when 2 or more gargoyles are pushed onto the button?

 

[Krabs]

See: Wiki :P

 

[Kyasarin]

See: Wiki :P

This isn't helping him at all.

There's a Linedef Executor (# of pushables, I think) which you can apply to an FOF where the button should be. The Linedef length controls how many pushable objects have to be inside the targeted Sector to have the effect, so make an invisible FOF where the button should be.