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In tis case the system being discussed is Vitsoe 606 which has an aluminium track fixed at roughly 300mm centres on the track. The shelves themselves then spread the force on the track and there are options for shelf size up to a table which has a supporting leg. They supply hilti fixings for plasterboard that are so good I started using them for my own projects after being supplied them for my shelving.
They are a rare case of a company who have their product installation figured out.
I don't mean to go against some of the very experienced builders in this thread. I'm just giving my own personal opinion here:
^I have no idea without seeing exactly what you're talking about. If it's easy to do, why not? But I would never hang shelving off drywall.
There's just too much leverage. However good the mounting points are, they only get worse with time. Shelves should not have adhere to a lower than expected weight limit. Im paranoid about somebody (child) getting hurt.
The list really goes on, But it all boils down to the fact that Drywall is not a structural material.