"Though one of the most distinguished and beloved of preachers in the French language, Gaussen was after a time suspended from the ministry, his principal offense being that instead of the church's catechism, a tame and rationalistic manual, almost destitute of positive faith, he had used the Bible in giving instruction to the youth. He afterward became teacher in a theological school, while on Sunday he continued his work as catechist, addressing the children and instructing them in the Scriptures. His works on prophecy also excited much interest. From the professor's chair, through the press, and in his favorite occupation as teacher of children he continued for many years to exert an extensive influence and was instrumental in calling the attention of many to the study of the prophecies which showed that the coming of the Lord was near. GC 366.1"
"Then Peter and the other apostles answered and said, We ought to obey God rather than men."
Both passages deal with individuals who prioritized obedience to God's word (or their understanding of it) over the dictates of religious authorities. Gaussen used the Bible instead of the church's catechism, while Acts 5:29 states the principle of obeying God rather than men.
"In Scandinavia also the advent message was proclaimed, and a widespread interest was kindled. Many were roused from their careless security to confess and forsake their sins, and seek pardon in the name of Christ. But the clergy of the state church opposed the movement, and through their influence some who preached the message were thrown into prison. In many places where the preachers of the Lord's soon coming were thus silenced, God was pleased to send the message, in a miraculous manner, through little children. As they were under age, the law of the state could not restrain them, and they were permitted to speak unmolested. GC 366.2"
"And said unto him, Hearest thou what these say? And Jesus saith unto them, Yea; have ye never read, Out of the mouth of babes and sucklings thou hast perfected praise?"
Both passages describe situations where children are used to proclaim a message, particularly when adults are silenced or unable to do so. The EGW passage describes children in Scandinavia delivering the advent message, while Matthew 21:16 quotes Jesus referencing the praise perfected out of the mouths of babes.
"they gave the warning of the judgment, employing the very words of Scripture: “Fear God, and give glory to Him; for the hour of His judgment is come.” They reproved the sins of the people, not only condemning immorality and vice, but rebuking worldliness and backsliding, and warning their hearers to make haste to flee from the wrath to come. GC 366.3"
"Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters."
The EGW passage directly quotes Revelation 14:7, making it a clear and explicit allusion.