My wife said that i make gurgling sounds in my sleep. what does this mean?

This may have many causes, but I would ask if she finds your greatly slowing or even stopping your breathing for a time [possible Obstructive Sleep Apnea], which really needs investigation soon. Other causes could range from nasal allergies, to mucus production should he be a smoker, to gastroesophageal reflux disease [GERD], to structural anomalies in his nose. Please see an M. D.