I want to run a superhero game with Modular Abilities that trigger themed disadvantages. For example, the advantage "Flight" would trigger the disadvantage "Cowardice"; the advantage "Damage Resistance" would trigger the disadvantage "Berserk"; the advantage "Telecommunication (Telesend)" would trigger the disadvantage "Truthfulness"; the advantage "Invisibility" would trigger the disadvantage "Kleptomania."
On page 106 I see that "Link" is meant to link multiple advantages. Thus I need a rule to link a disadvantage to an advantage. One approach might be to simply note that the two effects always go together and to deduct the points of the disadvantage from the advantage. Thus Telesend with Truthfulness would be 30-5 points for a total of 25 points. I suspect that GURPS already has a canonical way of doing this, however.