Gabungan Parti Sarawak (GPS) switched its support from Tun Dr Mahathir Mohamad to Tan Sri Muhyiddin Yassin after the former resigned as prime minister and Bersatu chairman, says Chief Minsiter Datuk Patinggi Abang Johari Tun Openg.

He said this after visiting the site of a proposed new Customs, Immigration, Quarantine and Security (CIQS) post at the border town of Serikin, Sarawak on Sunday.