No, that is not correct citation for at least this part:
"He who calls, O Ganga! Ganga! While life is flickering in the throat, goes when dead to the City of Vishnu and is not born again on earth.”
The above verse is found in Garuda Purana, Chapter 9 by Ernest Wood and S.V. Subrahmanyam. So it's IX, 30 instead of X, 30.
30: And the man who, when his life is leaving, contemplates with faith the Ganges, goes to the highest goal.
Translation of Garuda Purana, Chapter 10 by Ernest Wood and S.V. Subrahmanyam of relevant part is as follows:
30: Purified gold should be used, and sacrifice performed with Rikṣa mantras, with the mantra "Pretājayata," and with leaf-vessels.
79: He whose bones sink in the water of the Ganges within ten days, never returns from the world of Brahma.