Simple question about conditions. I'm working on a perk with a new custom ability effect. The effect have to work when certain items are equipped by the player.

For this I've no problem, but I have to put too many items in the conditions, it is possible to get GetEquipped using a Form List?

Yes. I have done this for power armor, and pulse gun effects. Create the formlist with the various items. Then call GetEquipped and give the formlist name. This will return true, if any of the items in the list are equipped.