In 1927, Gary began his romantic love affairs with Clara Bow. Clara Bow was an actress from United States. She helped him to get his first acting role in the movie Children of Divorce. This relationship lasted for several months.
Few months later, Gary was spotted with Evelyn Brent. They met each other for the first time in 1928 while they were filming in the movie Beau Sabreur. The following year, he also had romantic affairs with Lupe Vélez and this lasted for two years.
On 15th of December 1933, Gary got married to Veronica Cooper. Veronica Cooper was an actress from United States. She was also known by the name Sandra Shaw. This married life lasted till his death in on 13th of May 1961. He was of white ethnicity and his height was six feet and three inches tall.
Gary became active as an actor since 1925. He made his acting debut that year as a Rider in an American film The Trail Rider. He also starred in the movies likes Dick Turpin, The Thundering Herd, Riders of the Purple Sage and so on. The following year, he starred the role of Abe Lee in the movie The Winning of Barbara Worth. He got his rise is fame in 1941 in after he portrayed the role of Alvin C. York in the movie Sergeant York. For this role, he earned the salary of $150,000. His net worth was high.
In the early 1960s, Gary was diagnosed with prostate cancer and he underwent surgery on 14th of April 1960. He died of prostate cancer on 13th of May 1961 in Beverly Hills, Los Angeles, California, USA.