getFileModifyTime on Linux

Does the above function work properly on Linux? My experience with the TGE thus far has only been via Tribes 2, and that function doesn't seem to work on Tribes 2 for Linux. Before I start developing with the TGE, I was curious to find out if getFileModifyTime is a Tribes2-specific function, and whether or not it works in the current version of the TGE. Thanks!