It won't be a issue since Galomax works differently than most other TF's. Most of it works by looking for flags like "GALOMAX_DOSES" and "Gel Body" if you have those flags you are classed as a goo/gel 1 or 2 parts are set to block other TF effects like hair which you already accounted for. The rest basically just adds the "Gooey" flag to various body parts. So it should be fine works with other Similar TF's like Illumorpheme.
Aah, I see! I wasn't aware that was how Galomax works. I'm not sure I'll include a custom return specifically for that, but I'll think about it at the very least.