You can obtain Gear Shards through different ways:
● Gear Projection Ticket - these can be acquired from the Gear Projection Ticket which appears on the Daily Quests. You can only perform 3 dungeon runs per day.
● Disassemble - disassembling gears will give an ample amount of their gear shards, if you have a multiple copies of a specific gear, you can disassemble some to upgrade the others.
● Shops / Coin Exchange - you can purchase certain gear shards from Shops(Louise's) and Coin Exchange(Multiplay and various event coins)
● Event Milestones / Event Quests - some gear shards can only be obtained through event milestones/quests. Some of can only be obtained on a limit time.