False, JW's most certainly preach the only Gospel which of course is a message of reconciliation as an expression of God's Grace or undeserved kindness to all men of goodwill.
Scholar, your lies won't work here. Matt. 26:27-28 says that the new covenant is for the forgiveness of sins. This is how people are reconciled to God. But JW's preach that this covenant is closed to people. There is no forgiveness outside of the NC. Not one NT scripture supports this.
You know very well that the JW message: Be-Jehovah's-Friend-without-the-NC was not taught ANYWHERE by the apostles. Gal 1: 8&9 says that if anyone preaches any other gospel other than what the apostles preached that he would be cursed.
JW's preach a message of curses and failures.. They have a weird inability to follow even the simplest of instructions. Like when Jesus said, "Come to me, and I will give you rest". So, what to JW's do? They go to Jehovah instead.
When I came to Jesus as he instructed, my JW relatives considered me the enemy. Just try telling someone at the KH that Jesus is your personal savior and see how fast you get kicked to the curb.
My family is doing great after 18 years. Every JW family I knew has crashed and burned in one way or another.
The curse is real.