You should be well within distance even for the less expensive multimode fiber. (disclaimer, distance is also governed by laser/transmitter power, but your distance is well below what typical equipment can serve).

Quote:
Will this fiber even support gigabit connections?

Fiber is protocol-agnostic, so assuming you can mate up the right patch cables, GBICs and such (that match whatever class of fiber you have in place), I can't think of a reason why not.

Here's a colorful, usable fiber tutorial: l http://www.arcelect.com/fibercable.htm