Can I share our AIAA journal article on ResearchGate?
According to the guidelines you linked to, you are allowed to have your manuscript published on your &quot;personal website&quot;. I would interpret that term in such an extensive way that I would include your ResearchGate profile, for it serves the same function as a &quot;personal website&quot;. That is, it serves to showcase your research.
In addition, Sherpa/Romeo (a platform that collects data about journals' Open Access policy) seems to be equally liberal in interpreting the AIAA approach. Pick your specific AIAA journal here and read the guidelines. From what I understand, AIAA journals allow for a Green Open Access policy without any embargo, meaning that you can publish your manuscript (not the final, accepted one) on your private homepage (including your RG profile) immediately after publication.