GPIB, HP-IB and IEEE-488 are essentially the same thing. Almost all HP gear has it for linking all your lab equipment together. Hell, they used it on their much larger disk pack drives. I have an HP-85 with an HP-IB module the looking at the burn-in was attached to a mass spectrometer however I wouldn't doubt you could make it run a regulated power supply and print data from a logic analyzer.

However that's HP. National Instruments apparently saw a market for the mac but I have NEVER seen one of these cards being used for anything. I have never seven seen any mac software that had an option for using GPIB.