Whitelisting addresses is possible on Galler.
If your launchpad application is accepted, the Galler team will get in touch with you to set everything up. If you'd like to whitelist some wallet addresses to give some lucky community members certain perks during your minting campaign (free NFT, reduced price, rare NFT et.), the Galler team will collect the information during the launchpad set up.
Required info includes a list of addresses in a txt file and the perk associated with the whitelisting.