After obtaining her degree from Ryerson University, Kim decided to become a professional wrestler and joined Ron Hutchison's School of Pro Wrestling in Toronto.

[2] On June 26, Kim made her debut for World Series Wrestling (WSW) in Melbourne, Australia, losing to Nidia in a singles match.

[6] After several weeks of vignettes showcasing Matrix-like effects aired on Raw, Kim debuted on June 30 as a fan favorite, with a Matrix-inspired outfit.

[2] At WWE's Unforgiven pay-per-view event on September 21, Stratus and Lita defeated Kim and Holly in a tag team match.

[7] Following her release from WWE and the expiration of her 90-day no-compete clause,[7] Kim made sporadic appearances on the independent circuit, including at Michigan's All World Wrestling League and in Japan.

[17] Kim made her in-ring debut on July 16, 2006, at TNA's Victory Road pay-per-view in a Six Man Mixed Tag Team match with AMW against A.J.

The first encounter between the group was on February 11 at Against All Odds in a mixed tag team match, which Kim and her partner, Petey Williams, lost.

[24][25][26] She made her first title defense on November 11 at Genesis, where she retained the renamed TNA Women's Knockout Championship by defeating Roxxi Laveaux, ODB, and Angel Williams.

[50] In early 2010, a tournament was held for the newly vacated Divas Championship,[51] and Kim defeated Jillian Hall and Alicia Fox en route to the finals.

[2] On the August 1 episode of Raw, Kim participated in a battle royal to determine the number one contender for the Divas Championship, however, shortly after the match began, she eliminated herself.

[66][67] On the October 27 episode of Impact Wrestling, Jarrett named Kim the #1 Contender to Sky's title, before she went on to defeat Tara in her first match back with the promotion.

[68] On the November 3 episode of Impact Wrestling, Kim and Rayne defeated TnT (Tara and Brooke Tessmacher) to win the TNA Knockouts Tag Team Championship.

[78][79] On the March 8 episode of Impact Wrestling, Kim and Rayne lost the Knockouts Tag Team Championship to Eric Young and ODB.

[90] On January 13, 2013, at the Genesis pay-per-view, Kim competed in a five-woman gauntlet match to determine the number one contender to the TNA Knockouts Championship.

[91] Kim was defeated on the February 21 episode of Impact Wrestling, in a fatal four-way elimination match for the Knockouts Championship against champion Tara, Miss Tessmacher, and Velvet Sky after physical involvement from referee Taryn Terrell.

[101] On October 20 at Bound for Glory, Kim defeated ODB and Brooke in a three-way match, following interference from her new ally Lei'D Tapa, to win her third TNA Knockouts Championship.

[116][117] In her first title defense, Kim successfully retained her championship against Love, Madison Rayne and Brittany in a four-way match on the July 10 episode of Impact Wrestling.

[118] On the July 31 episode of Impact Wrestling, Kim successfully defended her championship against Taryn Terrell after the match went to a no-contest due to interference from The Beautiful People.

[124] On the January 30, 2015, episode of Impact Wrestling, in a three-way match for the Knockouts Championship, Kim and Madison Rayne lost to the defending champion, Taryn Terrell.

[125] On the May 1 episode of Impact Wrestling, Kim started an alliance with Awesome Kong to feud with Terrell, Jade and Marti Bell, collectively known as The Dollhouse.

[126] Kim sustained an arm injury on the May 29 episode of Impact Wrestling, after unsuccessfully challenging Terrell for the Knockouts Championship in a steel cage match and being attacked by The Dollhouse afterwards.

[127] After some hiatus, Kim returned on the July 15 episode of Impact Wrestling, portraying a superhero-like character and attacking Jade, which allowed Brooke to win the Knockouts Championship.

[128] On the September 16 episode of Impact Wrestling, Kim won her fifth Knockouts Championship by winning a four-way match also involving Brooke, Lei'D Tapa and Awesome Kong.

[130] During October and November (taped in July), she participated in the TNA World Title Series, where she ended first of her block, tied with Awesome Kong, advancing to the finals.

Shortly after, on October 2 at Bound for Glory she defeated Maria Kanellis for the Impact Women's Knockout Championship, winning the title for the record-tying sixth time which she had to vacate a week later after sustaining a back injury that forced her to take a few months off in-ring competition, during which Kim made a few appearances in November and December as she showed her support for Jade who feuded with Rosemary for the vacant championship.

[131][132][133] On the July 6, 2017, episode of the recently rebranded GFW Impact!, Kim returned to announce her legit retirement that is about to take place at the end of 2017.

A month later, on August 17, at Destination X, Kim faced Sienna for the Unified GFW Knockouts Championship which she was unsuccessful to win due to interference by the return of her old rival Taryn Terrell.

[140][141] In December, in order to prevent any shenanigans from their upcoming match, Kim was announced as the special guest referee for the next encounter between the two Knockouts, that was set for January 6, 2019, at Impact Wrestling Homecoming.

[1] On October 13, 2011, Gail Kim, along with The Miz, John Morrison, Kofi Kingston, Heath Slater and Eve Torres appeared on a special WWE edition of Family BrainSurge.

[171][172] In July 2023, Kim and fellow wrestler, Gisele Shaw, took part in the ninth season of The Amazing Race Canada, where they were eliminated first.