Were the Galatians following a completely different gospel or the same gospel corrupted?
They were not following a totally different gospel. The Galatian believers were being corrupted by Judaizers who polluted Paul's faith-plus-nothing gospel, insisting circumcision and the Law of Moses were also required for salvation. This mixing was a perversion of the truth, not a separate gospel.
Les explains that verse 7 makes clear the Galatians were not falling for a totally different Gospel. Instead, some were polluting or corrupting Paul's Gospel, like mixing water with wine. Paul's Gospel says salvation is by faith plus nothing. The Judaizers contradicted this, teaching that circumcision and keeping the Law of Moses were also necessary, or you could not be saved. That was not a separate gospel but a pollution and corruption of the truth. Paul wrote the whole letter to correct the Galatians from this error of believing something corrupt and perverted.
Which is not another; but there be some that trouble you, and would pervert the gospel of Christ.
More Questions
Does Galatians 1:7 mean the false teachers had a completely different gospel or the same gospel corrupted?
In Galatians 1:7 Paul says the Galatians were not falling for a totally different gospel, but some were polluting and corrupting Paul's gospel the way water is mixed with wine.
Was the 'another gospel' the Galatians followed a completely different gospel?
The 'another gospel' Paul mentions in Galatians 1:6 is not actually a different gospel, but the same gospel Paul used to establish the Galatians, now being perverted, polluted, and corrupted.
What was actually afflicting the Galatian churches according to Galatians 1?
The Galatian churches were afflicted by a perversion of the gospel, as Paul states in Galatians 1:6-7, where he marvels that they were so soon removed from him who called them into the grace of Christ unto another gospel, which is not another, but some who troubled them and would pervert the gospel of Christ.