There are three ways to reach Gemelli Lakes:
The most famous itinerary starts at the Mezzeno Huts (another place of interest that is unique in its being) and follows the CAI path 215 to reach the lakes in 2 hours.
Alternatively, it can be reached starting from Lake Carona and following the CAI 211 path.
Although for more experienced trekkers there is a third path which starts at Branzi and follows the CAI 212 path.