Sadly, checking “Execute Periodic Effect on Application” false had no effect.
I looked at the sample project from tranek’s GASDocumentation for ideas. In there, a Gameplay Cue is manually applied for the Sprint ability instead of being automatically applied when the Gameplay Effect is added. I tried the same thing in my project and indeed, the Gameplay Cue is only applied once, but this doesn’t work well for duration-based effects like buffs. You’d have to keep close track of the duration, then manually remove the effect and cue when the duration ends.