The Rav required saying Ga-ahl Yisroel outloud by the Shaliach Tzibbur with the congregation saying it out loud with him. I believe that Rav Moshe had a similar P'sak but I do not have the source in front of me. As to what to do if a congregant does not say Ga-ahl Yisroel with the Shaliach Tzibbur, I believe there are two valid positions. One could say Amen, for since it is L'Tzorach Hatefilah (according to some a required response) it is not considered a Hafsek between Geulah and Tefilah and is a true Geulah Arichtah, even more than Baruch Hashem Amein V'amein: or one could not respond with Amein to Ga-ahl Yisroel, just have in mind to fulfill one"s one hundred belessings (since one only needs Kavanah, not Ahmen to be Yotzei) and allow Semichat Geulah L'Tefilahto to trump saying Ahmen.<br>
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Kol Tov,<br>
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Stu Grant<br>
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