A lab I was working in awhile ago also had an old Gilson 222XL, we used ours
to make an automated gas flushing line. At first I tried using the software
from Micromass that had been running the whole system and just editing the
scripts. This worked but it was kind of clunky and tended to crash a lot.
Your best bet is to get the Trilution software from Gilson. The software is
kind of expensive but it is pretty hard to interface with the 222XL without
it. The software will let you control every aspect of the 222XL including
the relays and control ports on the back of the instrument. These are great
for controlling valves or pumps in your system.