Mikel , thank you so much! I really appreciate your help!
I already went and wrote a whole bunch of javascript to wrap and unwrap the items with the "object-row" depending on the screen size.
I will take a look again at your solution which I believe could be great!!!
While writing the javascript I was thinking how can it be that such a wonderful library as GSAP has no support for such an easy task! I wonder what other coder are using if not GSAP. I also think that GSAP can start support scroll? I mean we all use it with one scrolling library or another, I am seriously amazed! I learned GSAP with almost every example yet when getting into a "real world" project I got stuck.
I will get back to you with the final solution if you are interested. And again, thank you so much!