The Brief: To "gather someone" means to reprimand or correct them.

DEEP DIVE
“Gather” means to collect. Typically, the phrase “gather someone” is directed at an individual who has offended another person and needs to be corrected and/or reprimanded.
gather him with class, queen ๐ pic.twitter.com/2HGVn2HF8T
— ontheโ๏ธw/๐ ฑ๏ธwayne (@clintbeezy) October 8, 2020
Please gather him cuz idk wtf he talking bout ๐๐๐
— FrรฏZa ๐ฅถ (@MaxxFreeze) October 8, 2020