In GAS how does an ability that needs data from the client get it?

I have an ability that needs the action values X and Y from an input action. The problem is there’s no parameters in a gameplay ability so I have no way of passing these float values to the abilities. There’s no shortage of abilities you can think of from other games that use information from the client to work. Even looking or walking need these. But there doesn’t seem to be any easy way to do so.