No idea on the gorillapod, but the CAs are pretty lightweight so I'm sure you could rig it up somehow. Ideas for the bungee option would be strapping the ruler right to the balcony, or maybe with some of the cord or some bubble wrap material between the cord and balcony surface to alleviate vibrations.
Mics: Nak CM-300s, Nak CM-100s, CP-1s, CP-2s, AT-853s(Cards, Hypers, Omnis) CA-14s(Cards, Omnis)
Pres: CA STC-9200, CA-UBB
Recorders: Tascam DR-70D, DR-2D, Edirol R-09
ISO: 1 Teac ME-120, CP-3 Caps, AT-853 Subcard Caps