Short answers, pulled from the story.
Gonzo company was founded on the 11th of February 1992 by a group of animators who left Gainax. These founders were the creative engine behind Neon Genesis Evangelion and sought creative freedom from Gainax's rigid corporate structure.
Gonzo K.K. and Digimation K.K. merged on the 1st of April 2002 to form Gonzo Digimation K.K. This consolidation allowed the studio to produce high-profile series such as Last Exile and Gankutsuou: The Count of Monte Cristo.
Gonzo was delisted from the Tokyo Stock Exchange on the 30th of July 2009 due to severe financial difficulties and a deficit exceeding US$30 million. The company became insolvent and was forced to restructure by merging with GDH K.K. to form a new entity.
Rosario + Vampire was released on the 1st of January 2008 and became one of the studio's most successful titles in the West. This series was licensed by major streaming platforms including Netflix and helped the company post higher than expected profit margins by the 1st of April 2012.
Phantasy Star Online 2: Episode Oracle was released on the 7th of October 2019 and marked the studio's last major animation project. Following this release, the company shifted its focus to digital collectibles and the NFT market.