Not possible. Baptists hold to believers immersion. And it not the requirement in order to obtain forgiveness. See 1 Corinthians 1:17, For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.
You are exactly the man that would have been astounded in Cornelius’s house, seeing a host of Gentiles filled with The Holy Spirit.
You care about mode! Really!. Take off the hall monitors hat and open your eyes and see. Rules is rules sometimes, but not always. Some things are minor considerations, The Holy Spirit broke the supposed rules and brought living fire to the hearts and minds and tongues of the Gentiles from the start.
God is gracious, not a bureaucrat, don’t you see.
Peter had to be re-educated before even going to Cornelius’s house. Totally against major rules, not just minor.
I wish you could have seen the newly baptised baby I saw. Baptism is not just symbolic, a powerful spiritual reality takes place, God’s Light invades the dark formless soul by water and Spirit.
The difference between Gamaliel and the other Pharisees who all knew the letter of the Law is that Gamaliel left room open for The Spirit of the Law.
There are so many spiritual realities even believers do not see, they are students of the letter and by the letter, but of the Spirit they do not see.