GAINESVILLE, Fla. (CBSLA.com)  —  A Florida mom who runs a pro-gun Facebook page was shot by her 4-year-old son Tuesday.

Jamie Gilt, 31, told deputies that she was on her way to pick up a horse when her son accidentally shot her.

The boy was not harmed in the incident.

Her Facebook page -- "Jamie Gilt For Gun Sense" -- works to protect and expand the Second Amendment.

Gilt said she was driving in her pickup with her son in the backseat when he got his hands on the weapon -- a .45 caliber handgun -- and accidentally shot her in the back.

On Monday, Gilt had boasted about her son's ability to use a firearm. "My son gets jacked up to target shoot," she wrote.

She was taken to a hospital in Gainesville where she is reportedly in stable condition.