I was doing come comparisons with OPALjr's EQN2JED.EXE and noticed it's .jed files include the fuses to disable unused product terms.
GALasm seems to enable all the product terms.
From https://www.ythiee.com/2021/06/06/pld-glossary/
Product Term Disables
Applies to GAL16V8 & GAL20V8 only.
Feature for reduced power consumption.
In the ACW one PTD(#0..63) bit enables or disables the respective product term.
Would it be difficult to add this to GALasm ?