I want to search for unread mails but with specific circle.
Is it possible or I've to press next => next page and have to look it manually to find unread emails under specific Google+ circle - as Google+ is now integrated with Gmail?
Gmail currently does not support an advanced search to let you combine an unread filter with a circle filter.
I would imagine if and only if there was such a filter it would like
[ circle:Friends is:unread ]
But there is no such filter unfortunately.
I've observed today that Google has added this feature, so common
operators are working along with
circle syntax while searching mails.
just disable the lab "App Search" and clause circle:XXX will work along with is:unread and other search clauses.