The 33-year-old reality TV star was photographed by In Touch Weekly walking arm-in-arm with her alleged beau, a contractor who previously worked for Christina and her soon to be ex-husband Tarek El Moussa.
The couple was reportedly strolling in Yorba Linda, CA, near Anderson's home.
A source told the magazine that Christina and Gary "seemed so relaxed and comfortable together -- totally in sync."
"Christina looked adoringly at him," added the source. "She was beaming!"
Tarek filed for divorce earlier this month citing irreconcilable differences. In the paperwork, he's asking for joint custody of their daughter Taylor, 6, and son Brayden, 16 months, as well as spousal support from Christina.
The HGTV stars announced on December 12 they were splitting after seven years of marriage. They were already living apart and both began dating other people months prior to the announcement of their separation.
Christina and Tarek, who tied the knot in May 2009, said in a joint media statement in December that "challenges" and an "unfortunate misunderstanding" from May 2016 are the reasons behind their breakup.
In light of news Christina is dating Gary, conflicting information from insiders has circulated as to whether infidelity played any role in the demise of her marriage. Tarek and Christina, however, recently denied cheating allegations.
The seventh season of the couple's HGTV reality series, Flip or Flop, debuted on December 1. Later that month, a source told E! News additional episodes of Flip or Flop will be filmed in 2017 in order to fulfill contractual obligations, however, "the show will end after that."
Tarek and Christina said they are determined to continue the show together by handling the divorce process "civilly and cooperatively." However, reports continue to swirl Christina thinks Tarek is an arrogant "pig" and they don't even get along anymore.