Here are three ways to get to the gym.
If you are coming from Mishmar Hagvul the quickest is the yellow path which is Mikvei Yisroel street. The gym is right behind Yad Shalom hall.
If your coming from maavar Hamittle area , than there are two options.
The orange path which is straight down Karl Netter until Rubin Gardens
or the blue path which is behind 127 Karl netter which goes straight to the gym.
Look out for signs to direct you there.
The woman's main entrance on side oof gym closer to Karl Netter and the Mens main entrance is closer to Rubin Gardens.
Ksiva V'Chasiima Tova!