The husband-and-wife duo – ranked eighth in the world - defeated Indonesia's Praveen Jordan and Debby Susanto 21-19, 17-21, 21-9 in their gripping semi-final, to record their fifth straight win over the reigning YONEX All England champions.
They will play either Denmark's Joachim Fischer Nielsen and Christinna Pedersen or China's Zheng Siwei and Chen Qingchen in the gold medal match, having shown fine form en route to the season-ending final.
Badminton is one of five sports to lose its funding from UK Sport ahead of the Tokyo 2020 Olympic Games cycle, and victory in Dubai could be vital in their appeal against the decision.
Inclusion of new Paralympic sports hailed as 'game-changing' by GB Taekwondo CEO Archibald
Speaking on Twitter, Chris said: "So happy to be back in the final. A good performance and a great third set for us.
"Amazing support from everyone here and back home. Now it's time to rest up for tomorrow."
Gabby added: "Loved every second of that match! Tough battle with Debby/Jordan but so happy we came out on top. Roll on tomorrow." Sportsbeat 2016
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'What a sensational victory!' - Indonesia pair celebrate wildly after badminton gold