Also don't forget your Grand Company offers special gear too in exchange for Company Seals you would be earning if you're doing FATEs. The gear can't be sold, usually can't be dyed and cannot be spiritbound either, but some of it is unique in appearance and often has stronger stats than equivalent crafted gear for that level so til level 50 at least it's still useful while levelling up (also GC gear has an added benefit of the more 'GC' gear you equip, individual pieces often have small bonuses stacked on them like buffs to a certain stat based on how much GC gear you currently have equipped, making it very worthwhile.

Either way, it should go without saying but GC gear can be acquired from the Company Quartermaster at your GC HQ.