The dev note around the park scene in Remake is a bit too vague for me to comment on, but maybe jealousy plays a factor? Kinda weird considering they just met, but they did share a friendly moment before so it could be confusion on what her angle is.
As for Gongaga, nothing aligns with how Cloud expresses jealousy before or after that scene. All reads as a clumsy way to try and comfort her and he ends up getting both women upset with him.
A neat observation that’s popping up though is that as Tifa smooths things over and Cloud looks back, he could have realized that his own words about Zack ( either in EN or JP ) could be aimed back at him about Tifa. Makes sense to me, and it ties in neatly to their subplot started in Kalm.