Summary
The main definitions that you need to know are:
A gram equivalent is the WEIGHT of an element or ion which combines with or replaces 1 gram of Hydrogen.
The equivalence of any component is the number of equivalents of that component in 1000 cm3 (or 1 litre) of the total system.
The Milliequivalence of any component is the number of milliequivalents of that component in 1000 cm3 (or 1 litre) of the total system.