how do i install gears for offline gmail ?

Although Google didn't make Gears officially available for Flock, they provided instructions on how to get it installed on Flock.

We already have a discussion about this here: http://getsatisfaction.com/flock/topi...

If you don't want to get your "hands dirty", you can also grab the pre-compiled extension from http://www.noobit.us/gears-flock/gear.... This was made by me with the instructions Google provided (so, nothing extra there).

I don't quarantine that it's working without any bugs in Flock nor that it will update itself automatically. I tested it with Flock 2.0.3 and 2.1a1 and it was detected successfully by Wordpress and Google Calendar.