I was going to say geelong - i saw them advertise their open trial for Devo squad. YMCA Geelong I believe actually has a bit of a more well rounded approach than the NCE used to have. NCE is definitely not taking any younger gymnasts at the moment, in fact, parents had to fight to keep the 2024 eligible kids at the gym. Most of them have left and headed back to clubs now anyway with the structure change. I know that 2 of the current geelong coaches have previously been at NCE in some capacity or other over the last few years.
The will be looking only at ability to listen, follow instructions, and I'm guessing doing basic physical testing. Generally they look at flexibilty in splits and bridge (doesn't have to be great, just potential) speed down the vault run, and upper body strength with a rope climb, or chin up test. They will likely look at some basic skills too, but will be aware than many may not have any gymnastics background at the younger ages. The premise is are they physically suited to gymnastics (they may ask for parents and grandparents heights) and do they like going upside down ( fear factor ).
I like geelong's program for a few reasons, they already are established and were a strong feeder for NCE upper levels for a number of years. They already have a well established ALP program, so there are lots of options within the club if the accelerated pathway (elite) doesn't work, and they have, from what I've heard, a good approach to family connectedness etc.
At 4.5 it is likely to be a pre-squad, non competitive start, although i am not sure. And the big hours don't generally start for a while, i would imagine you might be looking at one or two nights at that age to begin with with a strong developmental focus on basics.