Allan Adler asks about GAP under DOS 4.01:

I have no way to test it under DOS 4.01, but know of no reason why it should
not work. You must supply VCPI or EMS to support running in 386 32 bit
mode, and must avoid various products (like Windows) which interfere
with this.

Steve

PS Why not upgrade to 5.0 - they tell me it's MUCH better than 4.x