St. Gennadios Scholarios certainly was a Thomist, as were the celebrated anti-unionists Joseph Bryennios and Makarios Makres.
Let's not get carried away.
The following older thread provides excellent discussion concerning the supposed Thomism of St. Gennadios Scholarios.
It really doesn't. The thread is a long joke. Hardly anyone besides Fripod had anything but the usual talking points/ propaganda on offer.
The post you quote is silly.
One doesn't need to agree with Aquinas on every point of doctrine to be a Thomist. Otherwise, there are no Thomists in the RC church today since Aquinas argued against the immaculate conception. Thomism is distinctive chiefly as a method, developed from Aristotelianism, for doing theology.
The argument that Saint Gennadios' interest in Aquinas was purely philosophical/ academic is absurd. The fact that he was a scholar long before he was a cleric is rather irrelevant. For one thing, Mark of Ephesus was one of his chief teachers in his early academic years. Theological studies were a major part of his work.
There is very little in Aquinas' summae that is not Orthodox, so it would certainly not require heavy editing to excise those parts. The reason why St. Gennadios abridged his translations of the Summae
was much more practical, as he states in the preface- it was simply unwieldy for him to try to translate and publish the full volumes especially after the Ottoman conquest.