United Alliance of Sabah

The United Alliance of Sabah (Gabungan Bersatu Sabah; abbreviated: GBS) was a political coalition bringing together Sabah-based opposition parties in Malaysia established by Joseph Pairin Kitingan following the fall of the Barisan Nasional coalition in the 2018 Malaysian general election. The new coalition was intended to include the United Sabah Party, Homeland Solidarity Party and remnants of former Sabah BN members, mainly those of the United Malays National Organisation's Sabah branch led by Musa Aman who was rumoured to have intended on joining to PBS. However, no such move materialised, with Musa Aman remaining a member of UMNO and BN.

GBS was founded by 5 political parties in Sabah namely Parti Bersatu Rakyat Sabah (PBRS), Parti Bersatu Sabah (PBS), Parti Solidariti Tanah Air-ku Sabah (STAR Sabah), Sabah Progressive Party (SAPP) and Independently-built UMNO Sabah.

In February 2020, during the 2020-2022 Malaysian political crisis, the coalition supporter Perikatan Nasional in forming a new federal government. Subsequently, PBRS rejoined Barisan Nasional, while SAPP and STAR joined Perikatan Nasional, while PBS remained independent of either peninsula-based coalition.

These parties then merged through their respective coalitions to form the Gabungan Rakyat Sabah (GRS) to face the Sabah state election in September 2020.