if you want to learn about array, i highly recommend you to invest your time on this
https://hutonggames.fogbugz.com/?W715it is called arraymaker and it is way better than the built in.
Now, to answer your question.
since you already store all the game object in say "arrayObject", the next step is to retrieve it one by one. so it goes like this
1. array get object and enter the index
2. Use "get fsm float" command, and enter the object that you retrieve and name of the variable that you want to retrieve
3. store it in a temp variable "tempFloat" and add it to the new array "arrayFloat"
4. add the index +1 and repeat process no 1
your arrayFloat should filled with all the float that you retrieved
good luck