After being cut from DLSU, Cu played professional 3x3 basketball for
Barangay Ginebra.
Barangay Ginebra (2023–present) Cu was drafted by
Barangay Ginebra in the second round of the
Season 48 draft with the 23rd overall pick. In his first four games with Ginebra during the
2023–24 Commissioner's Cup, he did not score a point. Although he only played in eight games that conference, he impressed Coach
Tim Cone with his passing and decision-making. He was selected to be part of Team Greats for the Greats vs. Stalwarts game during the
2024 PBA All-Star Weekend. Before the start of the
2024 Philippine Cup, Cone had him train with
Gilas Pilipinas as a practice player. In a win over the
Phoenix Fuel Masters, he had 12 points, making four three-pointers. He then followed it up with 14 points with four three pointers once again in a win over the
Blackwater Bossing. The following game, against the
NorthPort Batang Pier, he led the team to the win with season-highs of 24 points on 6-of-11 shooting from three, 10 rebounds, and nine assists. He almost became the first rookie since teammate
Scottie Thompson in 2016 to have a triple-double. In the playoffs, they beat the
Magnolia Hotshots to enter the semifinals. In Game 1 of the semifinals, he stepped up with 18 points on six three pointers as Ginebra took the opening win. The series lasted seven games, with Meralco eventually eliminating them and moving on to the
finals. Ginebra made the
finals in his second season, during the
2024 Governors' Cup against the
TNT Tropang Giga. In his first finals appearance, Cu had 13 points, five rebounds, and six assists, and helped keep the game close before TNT pulled away. TNT went on to win the finals in six games. They also made the
finals in the
2024–25 Commissioner's Cup. == Personal life ==