Did Paul preach the Kingdom gospel in Ephesus according to Acts 20:17, 25?

Requested Answer:
Acts 20:17, 25 (KJV) And from Miletus he sent to Ephesus, and called the elders of the church. And now, behold, I know that ye all, among whom I have gone preaching the kingdom of God, shall see my face no more. 

Does this mean that Paul was indeed preaching the kingdom gospel? As the audience here are the elders of the church of Ephesus? 

There's a short answer and a long answer here.

The short is this: God's kingdom spans the 3rd heaven and ALL of creation, the created heavens and the earth. All of it is God's kingdom. So, the word 'kingdom' is not only associated with the kingdom gospel and that which was preached and promoted by Jesus and the 12-apostles. The word kingdom is typically associated with this time and the gospel they preached was known as the 'kingdom' gospel, which promoted the earthly kingdom that Jesus would reign over in the Millennial kingdom.

However, the heavens, our inheritance, as the body of Christ, is also part of the 'kingdom' of God. Paul uses the word kingdom a number of times in his epistles, but none of them are associated with the kingdom gospel and earthly inheritance of the Jews. When Paul uses the word kingdom, it is simply referring to the heavenly kingdom as part of God's greater domain, and that which is associate with the mystery program.

To confirm this, see these scriptures: Romans 14:17; 1 Corinthians 6:10; 1 Corinthians 15:24; 1 Corinthians 15:50; Galatians 5:21; Ephesians 5:5; Colossians 4:11

...including this one written to Timothy, which clearly shows Paul referring to the heavenlies, our inheritance in Christ, as a 'heavenly kingdom',

2 Timothy 4:18 And the Lord shall deliver me from every evil work, and will preserve me unto his heavenly kingdom: to whom be glory for ever and ever. Amen.

So, this is the short answer. This just proves that the word kingdom, is mostly associated with Israel's earthly kingdom program, but it is certainly not exclusive to it. Paul uses the word kingdom many times in reference to the mystery program too.

The long answer can be seen from a completely different perspective. It can be analyzed by looking at what Paul taught, and can be found in my 29-part study called: "Gospels and Raptures (Kingdom - Part 1): Introduction". To help find all 29 parts, you can use the index on blog site.

The essence of this study is to compare the four gospels of the New Testament:

1. The gospel of the Kingdom
2. The gospel of God
3. The gospel of Christ
4. The Grace gospel

... and also identify who taught what gospel, what was the message in that gospel, who were the recipients of that gospel, and what destination was promised in that gospel.

The study lays out clearly the comparative differences between all four gospels. You will notice in this study that Paul never preached the Kingdom gospel that Jesus and the 12-apostles preached. Paul started preaching the Gospel of God, and then introduced converts of this gospel to the details of the Gospel of Christ (which became the mysteries of the Grace gospel that we know today). If you are interested in the intricacies, you can work yourself through this study to really get a deep understanding of the gospels and their audiences.

God bless.