luceos wackyMole best thing to do is open a thread in extensions to let people know you are working on this implementation. In order to get the necessary support either ask specific questions under the dev tag or join us on gitter, where developer support can sometimes be done more easily.
heyitsritesh VIRUXE Someone already made this extension: https://discuss.flarum.org/d/2060-gravatar-extension It is unsupported. Any other alternative?
wackyMole I've been using this one for a few days now. I really like it, except for the inability to use one of Gravatar's default avatars, if the email doesn't exist in their system.
JohnP I haven't tried it but what about this: https://extiverse.com/extension/alexanderomara/flarum-gravatar
