The second leg will be held at the Saeb Salam Stadium in Manara, Lebanon next week.
Zob Ahan, another Iranian team, will face Beirut Club in the Third-Place Game on Wednesday.
“It's big history for Gorgan,” said head coach Mehran Hatami. “It's the first time for this club to be in this situation. It's the result of the great club that we have. And, the great, great, great fans that we have that support us.”
The regional tilt is extremely important in their aspirations, for the two best teams by the end of the Final 8 in June will qualify to the 2023 Champions Cup.