CentOS 7 PHP 7.1
/etc/localtime links to Asia/Hong_Kong (GMT + 8 )
Joomla 3.9.0 Server Website Time Zone set to Hong Kong
MySQL 5.5.56 stores my article publish_up at GMT.
Articles Good Search module 1.0.6.
My article publish time is say 2018-11-21 00:00:00 (content table publish_up is 2018-11-20 16:00:00).
At my local time (GMT+ 8 ) starting from 2018-11-21 00:00:00 I see that article on my category list as normal.
But Articles Good Search does not return that article until 2018-11-21 08:00:00. So I guess the module might take some time wrongly.