I doubt the Eye-Fi would work there. You best bet would be to use a GPS logger that you carry around with you that records your position every x seconds, and a software like GPSPhotoLinker to crosss-reference the GPS data and add the times to the tags.
I bought my logger (a Qstarz BT-1000x) from Canada GPS Online Shop. GPS Solutiions for Phone, PDA, Laptop, Netbook, PC & Mac. - GPS Receiver, Data Logger, Reatime Tracker & Navigation Software. (located in Toronto, Canada)
. There are a few hoops to jumt through to get it to work well in 10.6, but there are some models that are more mac-friendly. I bought the 1000x for the long battery life and great GPS sensitivity.
Mine:iMac 5k (4.0/24/1TB Fusion/295X), 12" MacBook (1.1/8/256), iPad Air 2 128GB WiFi, iPhone 7 Plus 128GB
Hers: 15" Late-2011 MBP (2.2/16/480 SSD), iPad Air 16GB WiFi, iPhone 5c 16GB
Home Server: 2010 Mac Mini (Core2Duo/8GB) with 14TB attached storage
Other Stuff: Apple TVs, Airport Expresses for AirTunes, ASUS 802.11ac routers