2010–11 season On July 21, 2010, Gibson signed a one-year deal with
Oyak Renault of the
Turkish Basketball Super League. On December 27, 2010, he parted ways with Oyak. In 11 games for the club, he averaged 18.1 points, 3.9 rebounds, 3.3 assists and 2.0 steals per game. On January 12, 2011, he signed with
Ironi Ashkelon of the
Israeli Basketball Premier League for the rest of the season. In 16 games for Ironi, he averaged 7.3 points, 1.1 rebounds and 1.3 assists per game.
2011–12 season On September 28, 2011, Gibson signed a one-year deal with
Trabzonspor of the
Turkish Basketball Super League. Despite a poor season for Trabzonspor,
a campaign that saw them go 6–24, Gibson averaged a league-best 19.9 points per game. He left the team prior to their season finale, and in 29 games, he also averaged 2.5 rebounds and 3.7 assists per game. On April 24, 2012, Gibson signed with
Enel Brindisi of the
Legadue for the rest of the season. He made his debut for Brindisi on May 5, in the team's regular season finale. They finished the regular season in third place on the ladder with an 18–10 record. Brindisi breezed through the quarter-finals and semi-finals, winning both series 3–0. In the Finals, they defeated
Giorgo Tesi PT 3–1 to win the league's playoff championship. Gibson dominated throughout the playoffs, and over 11 games for Brindisi (10 playoff, one regular season), he averaged 24.1 points, 3.5 rebounds, 3.4 assists and 1.5 steals per game. Winning the Legadue playoffs led to Brindisi being promoted to the
Lega Basket Serie A for the 2012–13 season.
2012–13 season In July 2012, Gibson joined the
Boston Celtics for the
2012 NBA Summer League. The Celtics went 4–1 at the Orlando Summer League and 2–3 at the Las Vegas Summer League. In 10 games for the Celtics, Gibson averaged 7.0 points, 1.3 rebounds and 1.6 assists in 12.8 minutes per game. On July 7, 2012, Gibson re-signed with
Enel Brindisi on a one-year deal. Brindisi finished the
2012–13 season in 12th place on the ladder with an 11–19 record, missing the playoffs in their first season back in the top league. Gibson appeared in all 30 games during the season, averaging 18.4 points (second in the league), 2.7 rebounds, 2.0 assists and 1.4 steals per game.
2013–14 season In August 2013, Gibson signed a one-year deal with the
Zhejiang Lions of the
Chinese Basketball Association. Gibson had a monster year with Zhejiang, appearing in 33 of 34 regular season games, missing only a January 10 game against the
Beijing Ducks. During the regular season, he scored 40 points or more four times, including a 46-point effort on January 8 against
Tianjin. Zhejiang finished the regular season in fifth place on the ladder with a 21–13 record. Gibson won the league's
scoring title with a 31.7-points-per-game average. In Game 1 of their quarter-final match-up with Beijing, Gibson scored 54 points to help Zhejiang win the game 113–110. However, the Lions went on to lose the next three games to bow out of the playoffs with a 3–1 defeat. Gibson averaged 39 points per game over the four quarter-final games. Following the conclusion of the
2013–14 CBA season, Gibson was offered a guaranteed deal by Russian club
Nizhny Novgorod, but he turned it down. He later signed a one-month deal with Iranian club
Petrochimi Imam on April 1, 2014. He made his debut for Petrochimi on April 20 in Game 1 of the team's semi-final series against
Zob Ahan. Petrochimi went on to sweep the series in three games to move onto the Finals. There they defeated
Mahram Tehran 4–1 to win their second straight title. Gibson scored 41 points in a Game 5 victory. In eight games for Petrochimi, Gibson averaged 30.9 points, 4.5 rebounds, 2.6 assists and 1.8 steals per game.
2014–15 season In July 2014, Gibson joined the
Portland Trail Blazers for the
2014 NBA Summer League, but he managed just one game and played a total of six minutes. Following his time with the Trail Blazers, Gibson signed a two-year deal with the
Zhejiang Lions, returning to the club for a second stint. However, in early October, he suffered a foot injury and was ruled out for four to six weeks. On January 7, 2015, he was ruled out for the entire
2014–15 CBA season in order to rehab his broken foot. On March 17, 2015, Gibson signed with
Petrochimi Imam for the 2015
WABA Champions Cup, but the competition never went ahead.
2015–16 season In July 2015, Gibson parted ways with Zhejiang after terminating his contract with the team. On August 30, 2015, he signed a one-year deal with fellow Chinese team
Qingdao DoubleStar. Gibson bested his 2013–14 CBA campaign by scoring 40 points or more in 24 games, including 50 points or more in four games. On December 13, 2015, he scored a career-high 56 points in a 138–124 win over
Jiangsu Tongxi. Despite his dominant individual season, Qingdao missed the playoffs with a 16–22 record. He averaged 42.0 points per game on the season, thus winning the CBA scoring title for the second time in three years. He appeared in 36 of the team's 38 games in 2015–16, and also averaged 6.7 rebounds, 5.1 assists and 2.1 steals per game. Three days later, he had a 26-point outing against the
Boston Celtics. His impressive Summer League display led to a contract offer from Mavericks, and on July 15, Gibson signed a partially guaranteed three-year deal with the team. He was waived by the Mavericks on October 22 after appearing in seven preseason games. He later re-signed with the team on November 18 and made his NBA debut that night. With the Mavericks missing their top three options at point guard—
Deron Williams,
J. J. Barea and
Devin Harris—all due to injury, Gibson backed-up
Seth Curry off the bench and had 11 points and a team-high three assists in an 80–64 loss to the
Memphis Grizzlies. The following night, he scored a game-high 26 points off the bench in a 95–87 loss to the
Orlando Magic. He became the first undrafted player to score 26 points in his first or second game since
Lloyd Daniels in 1992. He appeared in 11 straight games for the Mavericks while averaging 9.2 points in 18.6 minutes per game, before dropping out of the rotation and appearing in six of the next eight with just 4.5 minutes per game and registering four scoreless games. As a result, on December 27, he was waived by the Mavericks. On May 8, 2017, Gibson signed with
Anhui Dragons of China for the 2017
NBL season. In 13 games, he averaged 42.1 points, 5.2 rebounds, 5.5 assists and 2.2 steals per game.
2017–18 season On September 20, 2017, Gibson signed with the
Qingdao DoubleStar Eagles of the
Chinese Basketball Association, returning to the team for a second stint. In 38 games, he averaged 33.7 points, 6.8 rebounds, 4.7 assists and 1.5 steals per game. On March 1, 2018, Gibson was acquired by the
Erie BayHawks of the
NBA G League. After failing to report to the team within 48 hours, Gibson was suspended by the G League on March 11. Gibson's preferred destination was reportedly the
Texas Legends. On April 6, 2018, Gibson signed with the
Boston Celtics. He made his debut for the Celtics that night, scoring nine points in a 111–104 win over the
Chicago Bulls. In the Celtics' regular season finale on April 11, Gibson scored 18 points in a 110–97 win over the
Brooklyn Nets.
2018–19 season On September 11, 2018, Gibson signed with the
Qingdao DoubleStar Eagles of the
Chinese Basketball Association, returning to the team for a third stint. On April 9, 2019, Gibson signed with the
Boston Celtics, returning to the franchise for a second stint. However, he did not appear in a game for the Celtics during this stint.
2019–20 season On November 13, 2019, Gibson was reported to have signed with the
Jiangsu Dragons of the
Chinese Basketball Association. Gibson made his debut for the Dragons on November 21, 2019, with 31 points notched in a 130–114 win over the
Qingdao Eagles.
2020–21 season Gibson signed with the
Beijing Ducks on September 30, 2020.
2023–24 season Gibson signed with
Sagesse Club in January 2024. ==NBA career statistics==