Fix GSAP Parallax Timing

I need a skilled web developer to fix a GSAP parallax effect in a wordpress PHP template. The left side content and right side image need to move in sync. Currently, there's a timing mismatch: the right side image moves slower than the left side content.

Requirements:
- Adjust scroll triggers to sync movements
- Ensure left and right sides move at the same rate
More explanation of the issue requireing the ifx: when the left side content comes up, the right side Image should come down at the same time, at the same rate. So if the left side is "up" by 20% the right side is "down" by 20% and so on. They should both be at 100% at the same time.

Ideal Skills:
- Proficient in GSAP and JavaScript
- Strong understanding of scroll triggers
- Experience with PHP templates and web development

Please provide examples of similar work done.